astigmatism

Summary

Summary: Unequal curvature of the refractive surfaces of the eye. Thus a point source of light cannot be brought to a point focus on the retina but is spread over a more or less diffuse area. This results from the radius of curvature in one plane being longer or shorter than the radius at right angles to it. (Dorland, 27th ed)

Top Publications

  1. ncbi Small incision corneal refractive surgery using the small incision lenticule extraction (SMILE) procedure for the correction of myopia and myopic astigmatism: results of a 6 month prospective study
    Walter Sekundo
    Department of Ophthalmology, Philipps University of Marburg, Robert Koch Strasse 4, 35037 Marburg, Germany
    Br J Ophthalmol 95:335-9. 2011
  2. ncbi Foldable toric intraocular lens for astigmatism correction in cataract patients
    Javier Mendicute
    Ophthalmology Service, Donostia Hospital, Po Dr Begiristáin 115, San Sebastian, Spain
    J Cataract Refract Surg 34:601-7. 2008
  3. ncbi Laser in situ keratomileusis for myopia and astigmatism: safety and efficacy: a report by the American Academy of Ophthalmology
    Alan Sugar
    Ophthalmic Technology Assessment Committee 2000 2001 Refractive Surgery Panel
    Ophthalmology 109:175-87. 2002
  4. ncbi Quantitative analysis of regular and irregular astigmatism induced by pterygium
    A Tomidokoro
    Department of Ophthalmology, Omiya Red Cross Hospital, Saitama, Japan
    Cornea 18:412-5. 1999
  5. ncbi Corneal refractive power and eccentricity in the 40- to 64-year-old population of Shahroud, Iran
    Soheila Asgari
    Noor Ophthalmology Research Center, Noor Eye Hospital, Tehran, Iran
    Cornea 32:25-9. 2013
  6. ncbi LASIK for hyperopia, hyperopic astigmatism, and mixed astigmatism: a report by the American Academy of Ophthalmology
    Gary A Varley
    Ophthalmology 111:1604-17. 2004
  7. ncbi Iris registration in wavefront-guided LASIK to correct mixed astigmatism
    Mounir Khalifa
    Tanta University Khalifa, Tanta, Egypt
    J Cataract Refract Surg 35:433-7. 2009
  8. ncbi Topographic customized photorefractive keratectomy for regular and irregular astigmatism after penetrating keratoplasty using the LIGI CIPTA/LaserSight platform
    Maria Gabriella La Tegola
    Department of Ophthalmology and Otorhinolaryngology, Clinica Oculistica, University of Bari, Bari, Italy
    J Refract Surg 23:681-93. 2007
  9. ncbi Changes in higher order aberrations after wavefront-guided PRK for correction of low to moderate myopia and myopic astigmatism: two-year follow-up
    D Wigledowska-Promienska
    1st Department of Ophthalmology, Silesian University of Medicine, ul Caglana 35, 40 952 Katowice, Poland
    Eur J Ophthalmol 17:507-14. 2007
  10. ncbi Power vector analysis of the optical outcome of refractive surgery
    L N Thibos
    School of Optometry, Indiana University, Bloomington, Indiana 47405, USA
    J Cataract Refract Surg 27:80-5. 2001

Research Grants

Detail Information

Publications307 found, 100 shown here

  1. ncbi Small incision corneal refractive surgery using the small incision lenticule extraction (SMILE) procedure for the correction of myopia and myopic astigmatism: results of a 6 month prospective study
    Walter Sekundo
    Department of Ophthalmology, Philipps University of Marburg, Robert Koch Strasse 4, 35037 Marburg, Germany
    Br J Ophthalmol 95:335-9. 2011
    ..This 6 month prospective multi-centre study evaluated the feasibility of performing myopic femtosecond lenticule extraction (FLEx) through a small incision using the small incision lenticule extraction (SMILE) procedure...
  2. ncbi Foldable toric intraocular lens for astigmatism correction in cataract patients
    Javier Mendicute
    Ophthalmology Service, Donostia Hospital, Po Dr Begiristáin 115, San Sebastian, Spain
    J Cataract Refract Surg 34:601-7. 2008
    To evaluate the results of AcrySof toric intraocular lens (IOL) (Alcon) implantation to correct preexisting astigmatism in patients having cataract surgery.
  3. ncbi Laser in situ keratomileusis for myopia and astigmatism: safety and efficacy: a report by the American Academy of Ophthalmology
    Alan Sugar
    Ophthalmic Technology Assessment Committee 2000 2001 Refractive Surgery Panel
    Ophthalmology 109:175-87. 2002
    This document describes laser in situ keratomileusis (LASIK) for myopia and astigmatism and examines the evidence to answer key questions about the efficacy and safety of the procedure.
  4. ncbi Quantitative analysis of regular and irregular astigmatism induced by pterygium
    A Tomidokoro
    Department of Ophthalmology, Omiya Red Cross Hospital, Saitama, Japan
    Cornea 18:412-5. 1999
    To quantitatively evaluate the influence of pterygium and its removal surgery on both regular and irregular corneal astigmatism.
  5. ncbi Corneal refractive power and eccentricity in the 40- to 64-year-old population of Shahroud, Iran
    Soheila Asgari
    Noor Ophthalmology Research Center, Noor Eye Hospital, Tehran, Iran
    Cornea 32:25-9. 2013
    ..To determine the normal corneal curvature, power, and eccentricity in an Iranian population and their determinants...
  6. ncbi LASIK for hyperopia, hyperopic astigmatism, and mixed astigmatism: a report by the American Academy of Ophthalmology
    Gary A Varley
    Ophthalmology 111:1604-17. 2004
    To describe LASIK for hyperopia, hyperopia with astigmatism, and mixed astigmatism and to examine the evidence to answer questions about the safety and efficacy of the procedure.
  7. ncbi Iris registration in wavefront-guided LASIK to correct mixed astigmatism
    Mounir Khalifa
    Tanta University Khalifa, Tanta, Egypt
    J Cataract Refract Surg 35:433-7. 2009
    To investigate the predictability, safety, and efficiency of wavefront-guided laser in situ keratomileusis (LASIK) with iris-registration technology to correct mixed astigmatism.
  8. ncbi Topographic customized photorefractive keratectomy for regular and irregular astigmatism after penetrating keratoplasty using the LIGI CIPTA/LaserSight platform
    Maria Gabriella La Tegola
    Department of Ophthalmology and Otorhinolaryngology, Clinica Oculistica, University of Bari, Bari, Italy
    J Refract Surg 23:681-93. 2007
    To evaluate the use of a software ablation program (Corneal Interactive Programmed Topographic Ablation [CIPTA]) that provides customized photorefractive keratectomy (PRK) to correct astigmatism after keratoplasty.
  9. ncbi Changes in higher order aberrations after wavefront-guided PRK for correction of low to moderate myopia and myopic astigmatism: two-year follow-up
    D Wigledowska-Promienska
    1st Department of Ophthalmology, Silesian University of Medicine, ul Caglana 35, 40 952 Katowice, Poland
    Eur J Ophthalmol 17:507-14. 2007
    ..in higher order aberrations after wavefront-guided photorefractive keratectomy (PRK) in comparison with conventional PRK for low to moderate myopia with myopic astigmatism using a WASCA Workstation with the MEL 70 G-Scan excimer laser.
  10. ncbi Power vector analysis of the optical outcome of refractive surgery
    L N Thibos
    School of Optometry, Indiana University, Bloomington, Indiana 47405, USA
    J Cataract Refract Surg 27:80-5. 2001
    ..To demonstrate the power vector method of representing and analyzing spherocylindrical refractive errors...
  11. ncbi Analysis of biometry and prevalence data for corneal astigmatism in 23,239 eyes
    Peter Christian Hoffmann
    Castrop Rauxel, and Augenklinik, Bad Hersfeld, Germany
    J Cataract Refract Surg 36:1479-85. 2010
    To present and analyze biometry data sets and prevalence data for corneal astigmatism in a large population.
  12. ncbi One-year follow-up of posterior chamber toric phakic intraocular lens implantation for moderate to high myopic astigmatism
    Kazutaka Kamiya
    Department of Ophthalmology, University of Kitasato School of Medicine, Kanagawa, Japan
    Ophthalmology 117:2287-94. 2010
    To assess the 1-year clinical outcomes of toric Visian Implantable Collamer Lens (ICL; STAAR Surgical, Nidau, Switzerland) implantation for moderate to high myopic astigmatism.
  13. ncbi Collagen copolymer toric posterior chamber phakic intraocular lens in eyes with keratoconus
    Jose F Alfonso
    Fernández Vega Ophthalmological Institute, Surgery Department, School of Medicine, University of Oviedo, Oviedo, Spain
    J Cataract Refract Surg 36:906-16. 2010
    To assess the safety, efficacy, stability, and predictability of collagen copolymer toric phakic intraocular lens (pIOL) implantation to correct myopia and astigmatism in eyes with keratoconus.
  14. ncbi Intraobserver and interobserver repeatability of curvature and aberrometric measurements of the posterior corneal surface in normal eyes using Scheimpflug photography
    David P Pinero
    Vissum Instituto de Oftalmológico de Alicante, Farmacologia y Anatomia, Universidad de Alicante, Alicante, Spain
    J Cataract Refract Surg 35:113-20. 2009
    ..To assess the intraobserver and interobserver repeatability of curvature and aberrometric measurements of the posterior corneal surface provided by a Scheimpflug photography system in normal eyes...
  15. ncbi Prevalence of corneal astigmatism before cataract surgery
    Teresa Ferrer-Blasco
    Optometry Research Group, Optics Department, University of Valencia, Valencia, Spain
    J Cataract Refract Surg 35:70-5. 2009
    To analyze the prevalence and presentation patterns of corneal astigmatism in cataract surgery candidates.
  16. ncbi The effect of micro-incision and small-incision coaxial phaco-emulsification on corneal astigmatism
    Jun Wang
    Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing, China
    Clin Experiment Ophthalmol 37:664-9. 2009
    To evaluate the effect of micro-incision (2.2 mm) and small-incision (2.6 mm or 3.0 mm) coaxial phaco-emulsification on surgically induced astigmatism (SIA).
  17. ncbi Corneal astigmatism in applanation tonometry
    H H Mark
    Eye (Lond) 17:617-8. 2003
    ..This short study aims at quantitatively correlating scale readings of the Goldmann tonometer to corneal curvatures in one and the same eye...
  18. ncbi LASIK for myopia and astigmatism using the SCHWIND AMARIS excimer laser: an international multicenter trial
    Maria Clara Arbelaez
    Muscat Eye Laser Center, Muscat, Oman
    J Refract Surg 26:88-98. 2010
    To assess the efficacy, predictability, and safety of LASIK for the surgical correction of low to moderate myopia with astigmatism using the SCHWIND AMARIS excimer laser.
  19. ncbi Practical astigmatism analysis for refractive outcomes in cataract and refractive surgery
    Noel A Alpins
    New Vision Clinics, Cheltenham, Vic, Australia
    Surv Ophthalmol 49:109-22. 2004
    The fundamental concepts underpinning the vectorial analysis of astigmatism are straightforward and intuitive, easily understood by employing a simple golf-putting analogy...
  20. ncbi Prevalence of refractive errors among schoolchildren in Shiraz, Iran
    Abbasali Yekta
    Department of Optometry, Mashhad University of Medical Sciences, Mashhad, Vali Asr Ave, Tehran 19686, Iran
    Clin Experiment Ophthalmol 38:242-8. 2010
    ..To determine the prevalence of refractive errors in Shiraz schoolchildren by age and gender...
  21. ncbi Learning to adapt: Dynamics of readaptation to geometrical distortions
    Oren Yehezkel
    Goldschleger Eye Research Institute, Tel Aviv University, Sheba Medical Center, 52621 Tel Hashomer, Israel
    Vision Res 50:1550-8. 2010
    ..Observers wore a cylindrical lens of +1.00 D on one eye, thus simulating monocular astigmatism. The other eye was either masked with a translucent blurred lens (monocular) or unmasked (dichoptic)...
  22. ncbi Toric Implantable Collamer Lens for moderate to high myopic astigmatism
    Donald R Sanders
    Department of Ophthalmology, University of Illinois at Chicago College of Medicine, Chicago, Illinois, USA
    Ophthalmology 114:54-61. 2007
    To assess the efficacy of the Toric Implantable Collamer Lens (ICL) to treat moderate to high myopic astigmatism.
  23. ncbi Combined Descemet-stripping automated endothelial keratoplasty and phacoemulsification with toric intraocular lens implantation for treatment of failed penetrating keratoplasty with high regular astigmatism
    Vincenzo Scorcia
    Department of Ophthalmology, Magna Graecia University, Catanzaro, Italy
    J Cataract Refract Surg 38:716-9. 2012
    ..Surgery was intended to treat a cataract developing in a post-penetrating keratoplasty (PKP) eye with high astigmatism and endothelial decompensation...
  24. ncbi Phacoemulsification and customized toric intraocular lens implantation in eyes with cataract and high astigmatism after penetrating keratoplasty
    Ugo de Sanctis
    Department of Clinical Physiopathology, Ophthalmology Institute, University of Turin, Italy
    J Cataract Refract Surg 37:781-5. 2011
    ..cylindrical power was performed in 1 eye in 3 consecutive patients with cataract and high postkeratoplasty astigmatism (range 6.75 to 8.75 diopters [D])...
  25. ncbi Transepithelial, Topography-guided Ablation in the Treatment of Visual Disturbances in LASIK Flap or Interface Complications
    Xiangjun Chen
    SynsLaser Kirurgi AS, Tromsø, Norway
    J Refract Surg 28:120-6. 2012
    ..the efficacy and safety of a single-step, transepithelial, topography-guided surface ablation in the treatment of visual disturbances including irregular astigmatism and light scattering caused by LASIK flap or interface complications.
  26. ncbi Surgically induced astigmatism in combined phacoemulsification and vitrectomy; 23-gauge transconjunctival sutureless vitrectomy versus 20-gauge standard vitrectomy
    Dong Ho Park
    Department of Ophthalmology, School of Medicine, Kyungpook National University, 50 Samduk dong 2 ga, Chung gu, Taegu, South Korea
    Graefes Arch Clin Exp Ophthalmol 247:1331-7. 2009
    To study the surgically induced astigmatism (SIA) in combined phacoemulsification with 23-gauge transconjunctival sutureless vitrectomy (TSV) versus combined phacoemulsification with 20-gauge standard vitrectomy.
  27. pmc Perceptual adaptation to the correction of natural astigmatism
    Maria Vinas
    Instituto de Optica, Consejo Superior de Investigaciones Cientificas CSIC, Madrid, Spain
    PLoS ONE 7:e46361. 2012
    ..We evaluated whether the perception of oriented blur is biased by the native astigmatism, and studied the time course of the after-effects following spectacle correction of astigmatism in habitually ..
  28. ncbi Wavefront-optimized ablation versus topography-guided customized ablation in myopic LASIK: comparative study of higher order aberrations
    Hatem E El Awady
    Ophthalmology Center, Faculty of Medicine, Mansoura University, Mansoura, Egypt
    Ophthalmic Surg Lasers Imaging 42:314-20. 2011
    ..To compare the outcomes of wavefront-optimized ablation and topography-guided ablation in fellow eyes of patients undergoing laser in situ keratomileusis (LASIK) for myopia...
  29. ncbi Bitoric laser in situ keratomileusis for the correction of simple myopic and mixed astigmatism
    A S Chayet
    CODET Instituto de Oftalmologia, Tijuana, Mexico
    Ophthalmology 108:303-8. 2001
    To evaluate the safety and efficacy of bitoric laser in situ keratomileusis (LASIK) for the correction of simple myopic and mixed astigmatism.
  30. ncbi Comparative rotational stability of single-piece open-loop acrylic and plate-haptic silicone toric intraocular lenses
    David F Chang
    Private Practice in Los Altos, California, USA
    J Cataract Refract Surg 34:1842-7. 2008
    ..To prospectively compare the early rotational stability of AcrySof SN60T toric intraocular lenses (IOLs) with that in a retrospective series of AA4203 toric IOLs...
  31. ncbi Excimer laser correction of moderate to high astigmatism with a non-wavefront-guided aberration-free ablation profile: Six-month results
    Maria Clara Arbelaez
    J Cataract Refract Surg 35:1789-98. 2009
    To evaluate the postoperative clinical outcomes and higher-order aberrations (HOAs) in eyes with astigmatism greater than 2...
  32. ncbi Comparison of photorefractive keratectomy and laser in situ keratomileusis for the treatment of compound hyperopic astigmatism
    Mohamed Sameh H El-Agha
    Department of Ophthalmology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390 9057, USA
    J Cataract Refract Surg 29:900-7. 2003
    To compare photorefractive keratectomy (PRK) and laser in situ keratomileusis (LASIK) for compound hyperopic astigmatism.
  33. ncbi Early experience with the AcrySof toric IOL for the correction of astigmatism in cataract surgery
    Albena Dardzhikova
    Gimbel Eye Centre, Calgary, Alta, Canada
    Can J Ophthalmol 44:269-73. 2009
    ..IOL (tIOL) became available in Canada in 2006, thereby giving surgeons another option in the correction of astigmatism during cataract surgery. The purpose of this paper is to report the early experience of the acrylic AcrySof tIOL...
  34. ncbi Fourier analysis of induced irregular astigmatism. Photorefractive keratectomy versus laser in situ keratomileusis in a bilateral cohort of hyperopic patients
    Andrea Sciscio
    Department of Ophthalmology, St Thomas Hospital, London, England, United Kingdom
    J Cataract Refract Surg 29:1709-17. 2003
    To analyze corneal topographic data by Fourier analysis to determine differences in irregular astigmatism following spherical hyperopic correction by photorefractive keratectomy (PRK) or laser in situ keratomileusis (LASIK).
  35. ncbi Wavefront-guided laser in situ keratomileusis using the WaveScan system for correction of low to moderate myopia with astigmatism: 6-month results in 277 eyes
    Nada S Jabbur
    Refractive Surgery Center, The Wilmer Eye Institute, The Johns Hopkins University Jabbur, Baltimore, Maryland, USA
    J Cataract Refract Surg 31:1493-501. 2005
    To assess the safety and effectiveness of wavefront guided LASIK surgery using the Visx WaveScan system for correction of low to moderate myopia with astigmatism.
  36. ncbi Comparison of the AcrySof SA60 spherical intraocular lens and the AcrySof Toric SN60T3 intraocular lens outcomes in patients with low amounts of corneal astigmatism
    Michael Statham
    The Eye Health Centre, Brisbane, Queensland, Australia
    Clin Experiment Ophthalmol 37:775-9. 2009
    ..Toric intraocular lenses (IOLs) have been reported to be an effective method of reducing postoperative refractive astigmatism and spectacle dependence following cataract surgery...
  37. ncbi Astigmatism management in cataract surgery with the AcrySof toric intraocular lens
    Noel J C Bauer
    Department of Ophthalmology, Academic Hospital Maastricht, Debyelaan 25, Maastricht, The Netherlands
    J Cataract Refract Surg 34:1483-8. 2008
    ..To present clinical data from a single-center prospective clinical trial of the AcrySof toric intraocular lens (IOL)...
  38. ncbi Visual function and patient experience after bilateral implantation of toric intraocular lenses
    Iqbal Ike K Ahmed
    Credit Valley Eye Care, 3200 Erin Mills Parkway, Unit 1, Mississauga, Ontario L5L 1W8, Canada
    J Cataract Refract Surg 36:609-16. 2010
    To evaluate the efficacy, stability, predictability, and patient-reported outcomes of bilateral toric intraocular lens (IOL) implantation in cases of cataract with preexisting astigmatism.
  39. ncbi Comparison of Collamer toric implantable [corrected] contact lens implantation and wavefront-guided laser in situ keratomileusis for high myopic astigmatism
    Kazutaka Kamiya
    Department of Ophthalmology, University of Kitasato School of Medicine, Sagamihara, Kanagawa, Japan
    J Cataract Refract Surg 34:1687-93. 2008
    To compare the postoperative visual outcomes after implantation of a Collamer toric implantable contact lens (ICL) and after wavefront-guided laser in situ keratomileusis in high myopic astigmatism.
  40. ncbi Comparison of standard and aberration-neutral profiles for myopic LASIK with the SCHWIND ESIRIS platform
    Diego de Ortueta
    Augenlaserzentrum Recklinghausen, Recklinghausen, Germany
    J Refract Surg 25:339-49. 2009
    ..To compare the induced corneal wavefront aberration of eyes treated for myopia by LASIK with the SCHWIND ESIRIS laser using an aspheric aberration-neutral (Aberration-Free) ablation profile versus a classical Munnerlyn standard profile...
  41. pmc Monte Carlo simulation of expected outcomes with the AcrySof toric intraocular lens
    Warren Hill
    East Valley Ophthalmology, 5620 East Broadway Road, Mesa, Arizona 85206, USA
    BMC Ophthalmol 8:22. 2008
    ..To use a Monte Carlo simulation to predict postoperative results with the AcrySof Toric lens, evaluating the likelihood of over- or under-correction using various toric lens selection criteria...
  42. pmc Genome-wide meta-analysis of five Asian cohorts identifies PDGFRA as a susceptibility locus for corneal astigmatism
    Qiao Fan
    School of Public Health, National University of Singapore, Singapore, Singapore
    PLoS Genet 7:e1002402. 2011
    Corneal astigmatism refers to refractive abnormalities and irregularities in the curvature of the cornea, and this interferes with light being accurately focused at a single point in the eye...
  43. ncbi Astigmatic power calculations for intraocular lenses in the phakic and aphakic eye
    Edwin J Sarver
    Sarver andAssociates, Inc, Celebration, FL 34747, USA
    J Refract Surg 20:472-7. 2004
    ..To develop sets of equations employed in the power calculations for toric intraocular lenses (IOLs) in phakic or aphakic astigmatic eyes...
  44. ncbi The AcrySof Toric intraocular lens in subjects with cataracts and corneal astigmatism: a randomized, subject-masked, parallel-group, 1-year study
    Edward Holland
    Cincinnati Eye Institute, University of Cincinnati, Cincinnati, Ohio, USA
    Ophthalmology 117:2104-11. 2010
    ..Fort Worth, TX) in subjects with cataracts and preexisting corneal astigmatism.
  45. ncbi The efficacy of multi-zone cross-cylinder method for astigmatism correction
    Seong Joo Shin
    Department of Ophthalmology, Seoul Adventist Hospital, Seoul, Korea
    Korean J Ophthalmol 18:29-34. 2004
    ..study is to assess the efficacy of the multi-zone cross-cylinder method as compared with the single method for astigmatism correction using LASIK...
  46. ncbi Clinically significant corneal astigmatism and pars plana vitrectomy
    M Madison Slusher
    Wake Forest University Eye Center, Wake Forest University School of Medicine, Winston Salem, North Carolina 27157 1033, USA
    Ophthalmic Surg Lasers 33:5-8. 2002
    ..To report a rare and previously unappreciated potential wound-related complication of repeat pars plana vitrectomy (PPV) combined with anterior segment surgery...
  47. ncbi Wavefront-optimized surface ablation with the Allegretto Wave Eye-Q excimer laser platform: 12-month visual and refractive results
    Catia Gambato
    Department of Ophthalmology, University of Padova, Italy
    J Refract Surg 27:792-5. 2011
    ..To evaluate the wavefront-optimized algorithm of the Allegretto Wave Eye-Q (Wavelight AG) 400-Hz excimer laser platform...
  48. ncbi Visual outcomes of wavefront-guided laser in situ keratomileusis in eyes with moderate or high myopia and compound myopic astigmatism
    Simon R Bababeygy
    Department of Ophthalmology, Stanford University School of Medicine, Stanford, CA 94305, USA
    J Cataract Refract Surg 34:21-7. 2008
    To evaluate the safety, efficacy, and clinical outcomes of wavefront-guided laser in situ keratomileusis (LASIK) surgery for the treatment of moderate to high myopia and compound myopic astigmatism.
  49. ncbi Astigmatism analysis by the Alpins method
    N Alpins
    J Cataract Refract Surg 27:31-49. 2001
    To determine the effectiveness of correcting astigmatism by laser refractive surgery by a vectorial astigmatism outcome analysis that uses 3 fundamental vectors: target induced astigmatism vector (TIA), surgically induced astigmatism ..
  50. pmc Long-term efficacy and rotational stability of AcrySof toric intraocular lens implantation in cataract surgery
    Myung Hun Kim
    Department of Ophthalmology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
    Korean J Ophthalmol 24:207-12. 2010
    To evaluate the long-term efficacy and rotational stability of the AcrySof toric intraocular lens (IOL) in correcting preoperative astigmatism in cataract patients.
  51. pmc Inheritance of astigmatism: evidence for a major autosomal dominant locus
    M Clementi
    Servizio di Genetica Clinica ed Epidemiologica, Dipartimento di Pediatria, Universita di Padova, Italy
    Am J Hum Genet 63:825-30. 1998
    Although astigmatism is a frequent refractive error, its mode of inheritance remains uncertain...
  52. ncbi Comparison of the effect of three suturing techniques on postkeratoplasty astigmatism in keratoconus
    Mohammad Ali Javadi
    Ophthalmology Department, Labbafinejad Medical Center, Shaheed Beheshti University of Medical Sciences, Tehran, Iran
    Cornea 25:1029-33. 2006
    To compare the effect of 3 common suturing techniques on postkeratoplasty astigmatism and final best corrected visual acuity (BCVA) in patients with keratoconus.
  53. ncbi Wavefront-optimized versus wavefront-guided LASIK for myopic astigmatism with the ALLEGRETTO WAVE: three-month results of a prospective FDA trial
    Karl G Stonecipher
    Laser Center, Greensboro, NC, USA
    J Refract Surg 24:S424-30. 2008
    ..To compare visual outcomes using the WaveLight ALLEGRETTO WAVE to administer either wavefront-optimized (standard LASIK) or wavefront-guided (custom LASIK) treatments in myopic eyes...
  54. ncbi Role of light emitted by incandescent or fluorescent lamps in the development of myopia and astigmatism
    Damian Czepita
    Department of Ophthalmology, Pomeranian Medical Academy, Szczecin, Poland
    Med Sci Monit 10:CR168-71. 2004
    ..The purpose of our study was to determine if the development of refractive errors night be associated with exposure to light emitted by incandescent or fluorescent lamps...
  55. ncbi Astigmatism in 12-year-old Australian children: comparisons with a 6-year-old population
    Son C Huynh
    Centre for Vision Research, Department of Ophthalmology and Westmead Millennium Institute, University of Sydney, Australia
    Invest Ophthalmol Vis Sci 48:73-82. 2007
    To study the distributions of refractive (RA), corneal (CA), and internal astigmatism (IA) in 12-year-old Australian children and to explore differences from previous findings in 6-year-old children.
  56. ncbi Estimation of true corneal power after keratorefractive surgery in eyes requiring cataract surgery: BESSt formula
    Edmondo Borasio
    Moorfields Eye Hospital, London, United Kingdom
    J Cataract Refract Surg 32:2004-14. 2006
    ..To describe a new formula, BESSt, to estimate true corneal power after keratorefractive surgery in eyes requiring cataract surgery...
  57. ncbi A review of astigmatism and its possible genesis
    Scott A Read
    Contact Lens and Visual Optics Laboratory, School of Optometry, Queensland University of Technology, Brisbane, Queensland, Australia
    Clin Exp Optom 90:5-19. 2007
    b>Astigmatism is a refractive condition encountered commonly in clinical practice. This review presents an overview of research that has been carried out examining various aspects of this refractive error...
  58. ncbi Toric intraocular lens versus opposite clear corneal incisions to correct astigmatism in eyes having cataract surgery
    Javier Mendicute
    Ophthalmology Service, Donostia Hospital, San Sebastian, Spain
    J Cataract Refract Surg 35:451-8. 2009
    To compare toric intraocular lens (IOL) implantation with paired opposite clear corneal incisions (OCCIs) for astigmatism correction in patients having cataract surgery.
  59. pmc Three-dimensional super-resolution imaging of the midplane protein FtsZ in live Caulobacter crescentus cells using astigmatism
    Julie S Biteen
    Department of Chemistry, Stanford University, Stanford, CA 94305, USA
    Chemphyschem 13:1007-12. 2012
    ..crescentus cells at different stages of the cell cycle and find that the FtsZ superstructure is dynamic with the cell cycle, forming an open shape during the stalked stage and a dense focus during the pre-divisional stage...
  60. pmc The prevalence of refractive errors among schoolchildren in Dezful, Iran
    Akbar Fotouhi
    Epidemiology and Biostatistics Department, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
    Br J Ophthalmol 91:287-92. 2007
    ..To determine the prevalence of refractive errors among schoolchildren in urban and rural areas of Dezful County, Iran...
  61. ncbi Collagen copolymer toric posterior chamber phakic intraocular lenses to correct high myopic astigmatism
    Jose F Alfonso
    Fernández Vega Ophthalmological Institute, Surgery Department, School of Medicine, University of Oviedo, Spain
    J Cataract Refract Surg 36:1349-57. 2010
    To assess the safety, efficacy, stability, and predictability after implantation of a toric intraocular copolymer (Collamer) lens (pIOL) to correct high myopic astigmatism.
  62. ncbi Collagen copolymer toric posterior chamber phakic intraocular lens for myopic astigmatism: one-year follow-up
    Jose F Alfonso
    Surgery Department, Fernández Vega Ophthalmological Institute, School of Medicine, University of Oviedo, Oviedo, Portugal
    J Cataract Refract Surg 36:568-76. 2010
    To assess the predictability, efficacy, safety, and stability of collagen copolymer toric phakic intraocular lens (pIOL) implantation to correct moderate to high myopic astigmatism.
  63. ncbi Precut tissue for Descemet's stripping automated endothelial keratoplasty: vision, astigmatism, and endothelial survival
    Mark A Terry
    Devers Eye Institute, Portland, Oregon 97210, USA
    Ophthalmology 116:248-56. 2009
    ..To report 6 and 12 month results using precut tissue for Descemet's stripping automated endothelial keratoplasty (DSAEK) and correlate donor characteristics with clinical outcomes...
  64. ncbi [Femtosecond lenticule extraction (FLEx) - Results after 12 months in myopic astigmatism]
    M Blum
    Augenklinik, HELIOS Klinikum Erfurt GmbH, Erfurt
    Klin Monbl Augenheilkd 227:961-5. 2010
    ..This clinical trial is focussed on the 12-month results of a new method for refractive correction, femtosecond lenticule extraction (FLEx)...
  65. ncbi [Corneal ring segments (INTACS) for the treatment of asymmetrical astigmatism of the keratoconus. Follow-up after 2 years]
    Z Tunc
    Service d Ophtalmologie, Kadir Has University, Istanbul, Turquie
    J Fr Ophtalmol 26:824-30. 2003
    To evaluate the use of corneal ring segments (INTACS) for the treatment of asymmetrical astigmatism in keratoconus.
  66. ncbi Topography-Guided vs Wavefront-Optimized Surface Ablation for Myopia Using the WaveLight Platform: A Contralateral Eye Study
    Khalil Ghasemi Falavarjani
    Eye Research Center, Iran University of Medical Science, Iran
    J Refract Surg 27:13-7. 2011
    ..to compare treatments with wavefront-optimized and topography-guided ablations...
  67. ncbi Wavefront-guided LASIK for the correction of primary myopia and astigmatism a report by the American Academy of Ophthalmology
    Steven C Schallhorn
    American Academy of Ophthalmology, Quality Care and Knowledge Base Development, P O Box 7424, San Francisco, CA 94120 7424, USA
    Ophthalmology 115:1249-61. 2008
    To describe wavefront-guided (WFG) LASIK for the primary treatment of low to moderate levels of myopia and astigmatism and to examine the evidence on the safety and effectiveness of the procedure in comparison with conventional LASIK.
  68. ncbi Epidemiology and heritability of astigmatism in Norwegian twins: an analysis of self-reported data
    Andrej M Grjibovski
    Division of Epidemiology, Norwegian Institute of Public Health, Nydalen, Oslo, Norway
    Ophthalmic Epidemiol 13:245-52. 2006
    To describe the occurrence and heritability of astigmatism in a population-based sample of Norwegian twins.
  69. ncbi Randomized prospective clinical study comparing induced aberrations with IntraLase and Hansatome flap creation in fellow eyes: potential impact on wavefront-guided laser in situ keratomileusis
    Dan B Tran
    Coastal Vision Medical Group, Inc, University of California Irvine, Irvine, California, USA
    J Cataract Refract Surg 31:97-105. 2005
    ..To measure and compare the changes in objective wavefront aberration and subjective manifest refraction after laser in situ keratomileusis (LASIK) flap creation with a mechanical microkeratome and a femtosecond laser...
  70. ncbi Dominant genetic effects on corneal astigmatism: the genes in myopia (GEM) twin study
    Mohamed Dirani
    Centre for Eye Research Australia, University of Melbourne, Melbourne, Victoria, Australia
    Invest Ophthalmol Vis Sci 49:1339-44. 2008
    This study was conducted to assess the relative influence of genetics and environment on corneal astigmatism and corneal curvature in a large sample of twins.
  71. ncbi Astigmatism and its determinants in the Tehran population: the Tehran eye study
    Hassan Hashemi
    Farabi Eye Hospital, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran and Noor Vision Correction Center, Tehran, Iran
    Ophthalmic Epidemiol 12:373-81. 2005
    To determine the prevalence of astigmatism and its epidemiological risk factors in Tehran via a population-based study.
  72. ncbi Randomized prospective comparison of visian toric implantable collamer lens and conventional photorefractive keratectomy for moderate to high myopic astigmatism
    Steven Schallhorn
    Department of Ophthalmology, Navy Medical Center San Diego, San Diego, CA, USA
    J Refract Surg 23:853-67. 2007
    To compare the Visian Toric Implantable Collamer Lens (TICL), a toric phakic intraocular lens (IOL), and photorefractive keratectomy (PRK) in the correction of moderate to high myopic astigmatism.
  73. ncbi Wavefront-optimized ablation profiles: theoretical background
    Michael Mrochen
    Swiss Federal Institute of Technology and Institute of Biomedical Engineering, University of Zurich, Gloriastrasse 35, CH 8092 Zurich, Switzerland
    J Cataract Refract Surg 30:775-85. 2004
    To describe a method for calculating wavefront-optimized ablation profiles to precompensate for the spherical aberration and higher-order astigmatism induced by myopic, hyperopic, and astigmatic corneal laser corrections.
  74. ncbi Optical quality and depth-of-field of eyes implanted with spherical and aspheric intraocular lenses
    Susana Marcos
    Instituto de Optica, Consejo Superior de Investigaciones Cientificas, Madrid, Spain
    J Refract Surg 21:223-35. 2005
    ..To compare experimental optical performance in eyes implanted with spherical and aspheric intraocular lenses (IOLs)...
  75. ncbi Toric Implantable Collamer Lens for high myopic astigmatic Asian eyes
    John Chang
    The Guy Hugh Chan Refractive Surgery Centre, Department of Ophthalmology, Hong Kong Sanatorium and Hospital, Hong Kong
    Ophthalmology 116:2340-7. 2009
    To evaluate early visual outcomes, refractive outcomes, and complications of the Toric Implantable Collamer Lens (TICL) for the correction of high myopic astigmatism in Asian eyes.
  76. ncbi Surgically induced astigmatism in phacoemulsification, pars plana vitrectomy, and combined phacoemulsification and vitrectomy: a comparative study
    C Y F Yuen
    Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong, The People s Republic of China
    Eye (Lond) 23:576-80. 2009
    To study the surgically induced astigmatism (SIA) in combined phacoemulsification and vitrectomy, and compare with that when either procedure is performed alone.
  77. ncbi Safety and visual outcome of Visian toric ICL implantation after corneal collagen cross-linking in keratoconus
    Ali Fadlallah
    Hotel Dieu de France Hospital, Saint Joseph University, Beirut, Lebanon
    J Refract Surg 29:84-9. 2013
    ..To evaluate the safety and clinical outcome of phakic Visian toric implantable collamer lens (ICL) (STAAR Surgical, Monrovia, CA) insertion after corneal collagen cross-linking (CXL) in progressive keratoconus...
  78. ncbi Clinical outcomes of posterior chamber toric phakic intraocular lens implantation for the correction of high myopic astigmatism in eyes with keratoconus: 6-month follow-up
    Kazutaka Kamiya
    Department of Ophthalmology, University of Kitasato School of Medicine, 1 15 1 Kitasato, Sagamihara, Kanagawa, 228 8555, Japan
    Graefes Arch Clin Exp Ophthalmol 249:1073-80. 2011
    To assess the early clinical outcomes of toric implantable collamer lenses (toric ICL™, STAAR Surgical) for the correction of high myopic astigmatism with keratoconus.
  79. ncbi Effects of pterygium on corneal spherical power and astigmatism
    A Tomidokoro
    Department of Ophthalmology, Omiya Red Cross Hospital, Saitama, Japan Miyata Eye Hospital, Miyazaki, Japan
    Ophthalmology 107:1568-71. 2000
    ..To evaluate prospectively the corneal refractive status before and after pterygium surgery and its relationship with preoperative pterygium size...
  80. ncbi Bivariate polar value analysis of surgically induced astigmatism
    Kristian Naeser
    Department of Ophthalmology, Alborg Sygehus Syd, Denmark
    J Refract Surg 18:72-8. 2002
    To demonstrate the use of bivariate polar value analysis of surgically induced astigmatism following various cataract incisions.
  81. ncbi Long-term changes of the anterior corneal topography after photorefractive keratectomy for myopia and myopic astigmatism
    Marco Lombardo
    Fondazione G B Bietti Istituto Ricerca e Cura a Carattere Scientifico IRCCS, Rome, Italy
    Invest Ophthalmol Vis Sci 52:6994-7000. 2011
    To analyze the anterior corneal topography changes after 8 years after photorefractive keratectomy (PRK) for the correction of myopia and myopic astigmatism.
  82. ncbi Analysis of astigmatism in anterior segment surgery
    W F Harris
    Optometric Science Research Group, Department of Optometry, Rand Afrikaans University, Johannesburg, South Africa
    J Cataract Refract Surg 27:107-28. 2001
    To demonstrate techniques for analyzing astigmatism in the context of anterior segment surgery. The techniques are applied to refractive and corneal astigmatism and to astigmatism associated with the surgery.
  83. ncbi Effect of pupil size on uncorrected visual acuity in astigmatic eyes
    Kazutaka Kamiya
    Department of Ophthalmology, University of Kitasato School of Medicine, 1 15 1 Kitasato, Sagamihara, Kanagawa 228 8555, Japan
    Br J Ophthalmol 96:267-70. 2012
    ..To determine the effects of pupil size on uncorrected visual acuity (UCVA) in astigmatic eyes...
  84. ncbi Incidence and progression of astigmatism in Singaporean children
    Louis Tong
    Singapore National Eye Center, National University of Singapore
    Invest Ophthalmol Vis Sci 45:3914-8. 2004
    This study investigated the incidence and progression, as well as factors associated with changes in astigmatism in school children.
  85. ncbi [Impact of pterygium size on corneal topography and visual acuity - a prospective clinical cross-sectional study]
    B Seitz
    , Schwabachanlage 6, 91054 Erlangen, Germany
    Klin Monatsbl Augenheilkd 218:609-15. 2001
    PURPOSE: Pterygia may cause topographic changes featuring increase of astigmatism. The purpose of this study was to quantify the impact of the head-limbus-distance (=height) and limbal base length of the pterygium on the anterior corneal ..
  86. ncbi Combined corneal collagen cross-linking and posterior chamber toric implantable collamer lens implantation for keratoconus
    George D Kymionis
    Institute of Vision and Optics, Faculty of Medicine, University of Crete, Crete, Greece
    Ophthalmic Surg Lasers Imaging 42:e22-5. 2011
    ..in a two-step procedure seems to be an effective method for correcting keratoconus in patients with high myopia and astigmatism. Despite the encouraging results, longer follow-up is necessary to evaluate the outcomes of this approach.
  87. ncbi Re-treatment after laser in situ keratomileusis for correction of myopia and myopic astigmatism
    M A Bragheeth
    Division of Ophthalmology and Visual Sciences, B Floor, Eye Ear Nose Throat Centre, University Hospital, Queen s Medical Centre, Nottingham, UK
    Br J Ophthalmol 92:1506-10. 2008
    To evaluate the results of laser in situ keratomileusis (LASIK) re-treatment for under correction or regression after primary LASIK procedures for myopia and myopic astigmatism.
  88. ncbi Clear corneal incision of 2.75 mm for cataract surgery induces little change of astigmatism in eyes with low preoperative corneal cylinder
    F Giansanti
    Eye Clinic, Department of Oto Neuro Ophthalmological Surgical Sciences, Univ of Firenze, Firenze Italy
    Eur J Ophthalmol 16:385-93. 2006
    ..To assess the early astigmatic effect induced by 2.75 mm clear cornea incisions with different locations for cataract surgery...
  89. ncbi Relationship between astigmatism and aging in middle-aged and elderly Japanese
    Kazuko Asano
    Department of Ophthalmology, Chubu National Hospital, Obu, Japan
    Jpn J Ophthalmol 49:127-33. 2005
    To study the effect of aging on astigmatism in adult Japanese.
  90. ncbi Profile of anisometropia and aniso-astigmatism in children: prevalence and association with age, ocular biometric measures, and refractive status
    Lisa O'Donoghue
    Vision Science Research Group, School of Biomedical Sciences, University of Ulster, Coleraine, Northern Ireland, United Kingdom
    Invest Ophthalmol Vis Sci 54:602-8. 2013
    We describe the profile and associations of anisometropia and aniso-astigmatism in a population-based sample of children.
  91. pmc AcrySof toric intraocular lens for post-keratoplasty astigmatism
    Nishant Gupta
    Department of Ophthalmology, Advanced Eye Centre, PGIMER, Chandigarh, India
    Indian J Ophthalmol 60:213-5. 2012
    ..The eye had clear donor graft with residual astigmatism of -6.50 diopter cylinder (DC) at 30°...
  92. ncbi The effect of scleral buckling surgery on corneal astigmatism, corneal thickness, and anterior chamber depth
    Ebru Cetin
    Department of Ophthalmology, Dokuz Eylul University School of Medicine, Izmir, Turkey
    J Refract Surg 22:494-9. 2006
    ..To evaluate the effect of scleral buckling surgery on corneal topography, corneal thickness, and anterior chamber depth...
  93. ncbi Endothelial cell loss and surgically induced astigmatism after sutureless large-incision manual cataract extraction (SLIMCE)
    Dennis S C Lam
    Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong Eye Hospital, Third Floor, 147K Argyle St, Kowloon, Hong Kong
    Arch Ophthalmol 127:1284-9. 2009
    ..To describe a modified manual cataract extraction technique, sutureless large-incision manual cataract extraction (SLIMCE), and to report its clinical outcomes...
  94. ncbi Clinical comparison of 6 aberrometers. Part 2: statistical comparison in a test group
    Jos J Rozema
    Vision Lab, University of Antwerp, Belgium
    J Cataract Refract Surg 32:33-44. 2006
    ....
  95. ncbi Laser-assisted subepithelial keratectomy for low to high myopia and astigmatism
    Lee Shahinian
    J Cataract Refract Surg 28:1334-42. 2002
    To evaluate the safety and efficacy of laser-assisted subepithelial keratectomy (LASEK) for the treatment of low to high myopia and astigmatism.
  96. ncbi IntraLase-enabled astigmatic keratotomy for correction of astigmatism after Descemet stripping automated endothelial keratoplasty: a case report
    Eliya Levinger
    Department of Ophthalmology, Toronto Western Hospital, Donald K Johnson Eye Center, University Health Network, Yonge Eglinton Laser Eye Center, University of Toronto, Ontario, Canada M5T2S8
    Cornea 28:1074-6. 2009
    The purpose of this study was to report on the treatment of high astigmatism after Descemet stripping automated endothelial keratoplasty with IntraLase (IntraLase, Inc., Irvine, CA) -enabled astigmatic keratotomy (IEAK).
  97. ncbi Refractive findings in children with astigmatic parents: the Sydney Myopia Study
    Jenny M Ip
    Department of Ophthalmology, University of Sydney Centre for Vision Research, Westmead Hospital, The Westmead Millennium Institute, and the Vision Co operative Research Centre, Sydney, Australia
    Am J Ophthalmol 144:304-6. 2007
    To examine the impact of parental astigmatism on astigmatic error and ocular biometric parameters in children.
  98. ncbi Safety, efficacy, and stability indices of LASEK correction in moderate myopia and astigmatism
    Suphi Taneri
    Department of Ophthalmology, Massachusetts Eye and Ear Infirmary and the Schepens Eye Research Institute, Harvard Medical School, Boston, MA 02114, USA
    J Cataract Refract Surg 30:2130-7. 2004
    To evaluate the visual outcomes and complications in low to moderate levels of myopia and astigmatism treated with laser-assisted subepithelial keratectomy (LASEK) with a focus on postoperative recovery.
  99. pmc Which keratometer is most reliable for correcting astigmatism with toric intraocular lenses?
    Minwook Chang
    Department of Ophthalmology, Korea University College of Medicine, Seoul, Korea
    Korean J Ophthalmol 26:10-4. 2012
    ..To evaluate the accuracy of preoperative keratometers used in cataract surgery with toric intraocular lens (IOL)...
  100. ncbi Laser in situ keratomileusis with a scanning excimer laser for the correction of low to moderate myopia with and without astigmatism
    G Balazsi
    Clinique Laservue, Montreal, Quebec, Canada
    J Cataract Refract Surg 27:1942-51. 2001
    To evaluate the safety and effectiveness of and patient satisfaction with laser in situ keratomileusis (LASIK) performed with a scanning excimer laser by experienced surgeons to correct low and moderate levels of myopia and astigmatism.
  101. ncbi A retrospective comparison of LASIK outcomes for myopia and myopic astigmatism with conventional NIDEK versus wavefront-guided VISX and Alcon platforms
    Paul J Dougherty
    Dougherty Laser Vision Institute, 1821 Daily Dr, Camarillo, CA 93010, USA
    J Refract Surg 24:891-6. 2008
    ..POSE: To compare visual, refractive, and safety outcomes among a non-wavefront scanning-slit laser (NIDEK EC-5000) and wavefront-driven lasers (Alcon CustomCornea and VISX CustomVue)...

Research Grants61

  1. Gene Discovery in Familial Keratoconus
    Yutao Liu; Fiscal Year: 2013
    ..by progressive corneal thinning and protrusion of the thinned corneal, which leads to high myopia and irregular astigmatism. It is listed as a significant public health concern and a research priority by the National Institute of ..
  2. MRI Biometry of the Pseudophakic Cadaver Eye
    Susan A Strenk; Fiscal Year: 2010
    ..despite this renewed interest in IOLs for the correction of presbyopia (as well as myopia, hyperopia, and astigmatism), many questions remain regarding the: optic and haptic sizing and post-operative positional stability, ..
  3. A DATABASE OF IOL POSITION AND BEHAVIOR
    Susan A Strenk; Fiscal Year: 2010
    ..despite this renewed interest in IOLs for the correction of presbyopia (as well as myopia, hyperopia, and astigmatism), many questions remain regarding the: optic and haptic sizing and post-operative positional stability, ..
  4. Analysis of the Data from Vision in Preschoolers (VIP) Study
    Gui Shuang Ying; Fiscal Year: 2010
    ..VIP-targeted vision conditions, and for detecting each specific type of refractive error (myopia, hyperopia, astigmatism, and anisometropia) with various levels of severity, by using receiver operating characteristic (ROC) analysis...
  5. EPIKERATOPHAKIA: THE SURGICAL CORRECTION OF APHAKIA
    MARGUERITE MC DONALD; Fiscal Year: 1991
    ..of the epikeratophakia wound such that rapid visual recovery, improved dioptric predictability, and decreased astigmatism will result; 2) to compare the present method of lathing tissue grafts with two new methods, the dry state ..
  6. Corneal Wound Healing, Ocular Optics, and Endothelial Keratoplasty
    HOLLY BUTLER HINDMAN; Fiscal Year: 2013
    ..EK procedures have now gained widespread acceptance because of the faster recovery, less astigmatism, and greater wound stability...
  7. Small Incision Artificial Cornea
    YICHIEH SHIUEY; Fiscal Year: 2013
    ..the KeraKlear artificial cornea also avoids the common complications of corneal transplantation including high astigmatism, corneal graft failure and corneal graft rejection...
  8. MRI Biometry of the Pseudophakic Cadaver Eye
    Susan Strenk; Fiscal Year: 2007
    ..despite this renewed interest in IOLs for the correction of presbyopia (as well as myopia, hyperopia, and astigmatism), results have been disappointing and many questions remain regarding the optic and haptic sizing and post-..
  9. Amblyopia in astigmatic children: Development and Treatment
    Erin M Harvey; Fiscal Year: 2013
    ..Studies of Tohono O'odham children, 30 to 40% of whom have visually significant astigmatism, provide a unique opportunity for investigation ofthe effects of astigmatism...
  10. Changes in astigmatism and anisometropia with progressing myopia in COMET
    Jane E Gwiazda; Fiscal Year: 2013
    ..This valuable dataset presents a unique opportunity to investigate mechanisms of eye growth eventuating in astigmatism and anisometropia as well as myopia, topics not addressed in the original aims...
  11. Device for Facilitating Corneal Transplantation
    YICHIEH SHIUEY; Fiscal Year: 2006
    ..time of 1 to 2 hours, a long recovery time of 6 to 12 months, frequently large amounts of post-operative astigmatism which distorts vision, and risk of blinding complications including expulsive choroidal hemorrhage and ..
  12. Abnormalities in Keratoconus Corneas
    MARIA KENNEY; Fiscal Year: 2003
    Keratoconus is a corneal disorder characterized by excessive thinning of the stroma, severe irregular astigmatism and decreased visual acuity. It is a leading indication for corneal transplantation within the United States...
  13. ASTIGMATISM AND AMBLYOPIA AMONG NATIVE AMERICAN CHILDREN
    Joseph Miller; Fiscal Year: 2001
    High levels of astigmatism exist among Native American peoples. While the prevalence of astigmatism is well studied, its developmental course and visual consequences are poorly understood...
  14. EXCIMER LASER ABLATION TO CORRECT REFRACTIVE ERROR
    MARGUERITE MC DONALD; Fiscal Year: 1991
    ..excimer laser for the correction of high myopia, hyperopia, high hyperopia (aphakia), and myopic and hyperopic astigmatism, in terms of safety, efficacy, stability, and long-term corneal clarity and smoothness; 2) to determine the ..
  15. Shack-Hartmann Corneal Topographer and Aberrometer
    DANIEL NEAL; Fiscal Year: 2005
    ..This optical description will include not only the routine refractive errors of myopia, hyperopia, and astigmatism normally measured by present day optometers and corneal topographers, but will also determine the irregular, ..
  16. ROLE OF DIETARY N-3 FATTY ACIDS IN PREMATURE INFANTS
    Susan Carlson; Fiscal Year: 1992
    ..Ophthalmic screening will identify infants with myopia, hyperopia, astigmatism, aniosometria or strabismus precluding binocular testing...
  17. Adjustable Phakic Intraocular Lens
    Shiao Chang; Fiscal Year: 2003
    ..acrylic light adjustable phakic intraocular lens (LAL) for the treatment of high myopia and high myopia with astigmatism. The phakic LAL is an IOL whose power can be precisely adjusted with light 2-4 weeks after implantation to ..
  18. POST-OPERATIVE ADJUSTMENT OF INTRAOCULAR LENS POWER
    CHRISTIAN SANDSTEDT; Fiscal Year: 2000
    ..acrylate, lens fabrication, irradiation and dose-response curve measurement, and the introduction of selective astigmatism, including correction for hyperopia and myopia...
  19. Femtosecond Laser Posterior Lamellar Keratoplasty
    Tibor Juhasz; Fiscal Year: 2004
    ..Disadvantages of the procedure include high corneal astigmatism, sundry suture complications and a weak graft-host junction that is susceptible to wound dehiscence...
  20. Shack-Hartman Corneal Topographer and Aberrometer
    Larry Thibos; Fiscal Year: 2002
    ..This optical description will include not only the routine refractive errors of defocus and astigmatism normally measured by present-day optometers and corneal topographers, but will also determine the irregular, ..
  21. COLLABORATIVE LONGITUDINAL EVALUATION KERATOCONUS STUDY
    Karla Zadnik; Fiscal Year: 2004
    Keratoconus is typically characterized by marked irregular corneal astigmatism and corneal thinning, resulting in long-term dependence on rigid gas permeable contact lenses for correcting the corneal irregularity and producing usable ..
  22. INTRACORNEAL LENS FOR THE CORRECTION OF HYPEROPIA
    ALOK NIGAM; Fiscal Year: 2000
    ..The technology can be easily expanded to address other refractive problems like myopia and astigmatism. In addition, Nutrapore(TM) material will find application for implantable devices in other parts of the body...
  23. LASER WELDING OF OCULAR TISSUES
    WILLIAM JEFFERS; Fiscal Year: 1993
    ..is the development of laser tissue welding as an adjunct to homogeneous wound healing, and reduce residual astigmatism in corneal transplantation...
  24. Adjustable Phakic Intraocular Lens
    Shiao Chang; Fiscal Year: 2007
    ..to imprecise IOL power determinations, uncorrected visual acuity is often limited by pre-existing or induced astigmatism, making it necessary for the PIOL patient to continue with some form of spectacle correction or undergo an ..
  25. LASER SYSTEM FOR PHOTOTHERMAL INTRASTROMAL KERATOPLASTY
    LEIF FREDIN; Fiscal Year: 1991
    ..beam profile, spot size, pattern, and slew rate) shall be optimized for treatment of myopia, hyperopia, and astigmatism. In Phase 1 program research, a prototype laser system shall be constructed and evaluated for its utility in ..
  26. SPATIALLY RESOLVED OPTOMETER FOR HUMAN EYES
    Larry Thibos; Fiscal Year: 1999
    ..Such an optometer will determine not only the routine refractive errors of defocus and astigmatism normally measured by clinical optometers, but will also determine the higher-order optical aberrations (e.g...
  27. Low-cost High-resolution fundus camera
    PETER NONE SOLIZ; Fiscal Year: 2010
    ..In Phase I, a low-cost means for removing low-order aberrations, focus and astigmatism, was demonstrated...
  28. THERAPEUTIC CORRECTION OF ASTIGMATISM WITH EXCIMER PRK
    CHARLES MUNNERLYN; Fiscal Year: 1991
    ..The proposed devise would correct high amounts of astigmatism for which treatment with glasses and contact lenses is problematic because of induced binocular vision problems ..
  29. INTEGRATED ASSESSMENT OF CORNEAL FORM AND FUNCTION
    STEPHEN KLYCE; Fiscal Year: 2006
    ..visual performance in the form of increased internal light scatter and optical aberrations due to irregular astigmatism. The central theme of this research proposal is the refinement and application of a mathematical model that ..
  30. Improved data collection for FEI TF20 and Philips CM12 electron microscopes
    Esther Bullitt; Fiscal Year: 2009
    ..The 1K x 1K CCD that is currently on theTF20 is an excellent tool for astigmatism correction, focus adjustment, and for checking a sample after a low dose image has been recorded on film...
  31. Pathobiology of Corneal Disease
    Pamela Farthing Nayak; Fiscal Year: 2005
    ..corneal dystrophy which is characterized by progressive stromal thinning, severe nearsightedness, irregular astigmatism and scarring in the visual axes, is a leading cause of corneal transplantation in the US...
  32. MULTI-WAVELENGTH LASER ARRAYS FOR MEDICAL IMAGING
    JACK JEWELL; Fiscal Year: 1993
    ..Unlike conventional diode lasers, VCSELs emit low-divergence, circularly-symmetric beams which are free from astigmatism, and are thus ideally suited for imaging applications...
  33. CONTACT LENS EVALUATION IN KERATOCONUS
    Joseph Barr; Fiscal Year: 1990
    ..It is typically associated with marked irregular corneal astigmatism and is characterized by axial corneal scarring as the disease progresses...
  34. Multimode Multispectral Digital Vision Screening System
    JAMES KENNEMER; Fiscal Year: 2003
    ..have significant limitations, including excessive over-referral rates, inability to detect all angles of astigmatism, and weaknesses in the detection of media opacities, particularly in various ethnic groups that comprise a ..
  35. Postoperative Adjustment of Intraocular Lens Power
    Shiao Chang; Fiscal Year: 2002
    ..the calculation of IOL power is often imprecise due to pre-operative measurement error, post-operative astigmatism from irregular wound healing, or variability in the placement of an IOL...
  36. ABLATABLE MASK FOR LASER REPROFILING OF THE CORNEA
    RAYMOND HENRY; Fiscal Year: 1992
    ..Myopic and hyperopic conditions, scars, opacities, and astigmatism can theoretically benefit from laser surgery. Some 140 million U.S. citizens use corrective vision devices...
  37. CORNEAL PHYSIOLOGY AND KERATOPLASTY INDUCED GLAUCOMA
    Randall Olson; Fiscal Year: 1980
    ..close match between the recipient opening and the donor tissue, both in regards to this iatrogenic glaucoma and astigmatism. We are currently interested in variations of current techniques and also new techniques that will result in a ..
  38. EMMETROPIZATION AND DEVELOPMENT OF MYOPIA IN CHILDREN
    Jane Gwiazda; Fiscal Year: 2005
    ..Specific Aim 2: To investigate the role of ocular aberrations, including astigmatism, in the etiology of myopia...
  39. THERAPEUTIC CORRECTION OF HYPEROPIA WITH EXCIMER PRK
    WILLIAM TELFAIR; Fiscal Year: 1992
    ..Patients manifesting large amounts of hyperopic astigmatism, e.g...
  40. SURFACE MODIFICATION OF CORNEAL ONLAY LENSES
    DAVID CLAPPER; Fiscal Year: 1993
    ..for this research is to make possible the use of corneal overlay procedures for correction of aphakia, myopia, astigmatism, and other current refractive error conditions...
  41. Low cost, wearable, autorefraction device
    STEPHEN FANTONE; Fiscal Year: 2004
    ..the quality of prescriptions written in the developing world, to improve the early diagnosis of hyperopia and astigmatism in the United States of America, and increase the coverage and effectiveness of screening both in the US and ..
  42. OPTICAL AND NEURAL FACTORS IN NIGHT VISION
    NANCY COLETTA; Fiscal Year: 2002
    ..quality in normal eyes and to determine whether enhancement of the peripheral optics, such as by correcting astigmatism, would improve visibility in the peripheral visual field for night vision tasks...
  43. Femtosecond Laser Anterior Lamellar Keratoplasty
    Ronald Kurtz; Fiscal Year: 2002
    ..surgical skill requirements, and speed visual recovery (often delayed with current techniques due to induced astigmatism)...
  44. CONFOCAL LASER SCANNING MICROSCOPE - VIDEO,VECTOR & ZOOM
    JEAN MONTAGU; Fiscal Year: 1992
    ..scanners, reactionless resonant scanners and the "paddle scanner" configuration (which nearly eliminates any astigmatism from the system)...
  45. Scanning Ocular Aberration Measurement (SAM) System
    EDWIN SARVER; Fiscal Year: 2007
    ..In addition, the ability to measure these aberrations dynamically while the eye is changing focus from a distant to a near object will be provided. [unreadable] [unreadable] [unreadable] [unreadable]..
  46. Multi-Resolution Corneal Topography (MRCT)
    EDWIN SARVER; Fiscal Year: 2006
    ..research grant ..
  47. Subjective Refraction by Meridional Power Matching
    EDWIN SARVER; Fiscal Year: 2002
    ..Technological Innovation: Providing an accurate, low-cost, low-maintenance refractor that can be easily transported and used in hostile environments. PROPOSED COMMERCIAL APPLICATION: NOT AVAILABLE ..
  48. OPTICAL AND RETINAL LIMITS TO HUMAN VISUAL PERFORMANCE
    Larry N Thibos; Fiscal Year: 2010
    ..Project 6. Develop a new concept of wavefront tomography to characterize the 3-dimensional structure of the eye's optical system from a series of wavefront measurements along multiple lines-of-sight. ..
  49. A novel therapeutic for the treatment of persistent corneal epithelial defects
    Bennie H Jeng; Fiscal Year: 2010
    ..The results of this study could therefore support and lead to the commercialization of this non-surgical method for enhancing epithelial wound healing, which could ultimately benefit nearly 23,000 corneas in the United States annually. ..
  50. ABERRATIONS OF EYES IN NORMAL AND CLINICAL POPULATIONS
    Raymond A Applegate; Fiscal Year: 2010
    ..abstract_text> ..
  51. Computer-Aided Interpretation of Oculometric Data
    Michael Smolek; Fiscal Year: 2006
    ..For patients, refractive surgery outcomes will be more predictable, and they will benefit from earlier detection of diseases such as cataracts and corneal ectasias. ..
  52. CONTACT LENSES AND MYOPIA (CLAMP) STUDY
    JEFFREY WALLINE; Fiscal Year: 2003
    ..00 D and -3.00 D (spherical component) of myopia in each eye, less than 1.00 D of astigmatism in both eyes, less than 1...
  53. EYE GROWTH DURING INFANCY
    Scott Lambert; Fiscal Year: 2001
    ..In addition, by understanding the mechanisms retarding ocular growth, it may be possible to modulate the excessive ocular growth which occurs in certain pathological conditions such as retinopathy of prematurity. ..
  54. International Collaborative Twin Study of Refractive and Glaucoma Endophenotypes
    Terri Young; Fiscal Year: 2009
    ..This effort may lead to effective therapies for these potentially blinding disorders. ..
  55. New Approaches to Subjective Refraction
    Thomas Raasch; Fiscal Year: 2003
    ..This includes evaluating this approach to astigmatic determination in trial lens refraction, and in combination with portable optometers. ..
  56. Preschool Vision Screening in Primary Care Settings
    Alex Kemper; Fiscal Year: 2007
    ....
  57. 3D ELECTRON MICROSCOPY OF THE ATPase HRS-2
    PAWEL PENCZEK; Fiscal Year: 2005
    ..4) Determination of the effect of ATP binding on the structure of hrs-2. (5) Determination of the structural basis for the mechanism by which hrs-2 inhibits SNARE complex formation. ..
  58. OCULAR DEVELOPMENT IN INFANCY/EARLY CHILDHOOD
    Donald Mutti; Fiscal Year: 2005
    ..abstract_text> ..
  59. High Resolution and High Contrast Near-IR Imaging of the Human Fundus
    Nathan Doble; Fiscal Year: 2006
    ..Under this proposal, new imaging technology will be developed to fight debilitating eye disease resulting in earlier disease detection, faster drug clinical trials, and better medical understanding. [unreadable] [unreadable] [unreadable]..
  60. Longitudinal Analysis of Silicone Hydrogel (LASH) Study
    Loretta Szczotka Flynn; Fiscal Year: 2008
    ..224 patients will be enrolled and followed for three years in this longitudinal cohort study. ..