Hema Radhakrishnan

Summary

Affiliation: University of Manchester
Country: UK

Publications

  1. doi request reprint Peripheral refractive changes associated with myopia progression
    Hema Radhakrishnan
    CorrFaculty of Life Sciences, University of Manchester, Carys Bannister Building, Manchester, UK M13 9PL
    Invest Ophthalmol Vis Sci 54:1573-81. 2013
  2. ncbi request reprint Age-related changes in ocular aberrations with accommodation
    Hema Radhakrishnan
    Faculty of Life Sciences, University of Manchester, Manchester, UK
    J Vis 7:11.1-21. 2007
  3. ncbi request reprint Dynamics of ocular aberrations in keratoconus
    Hema Radhakrishnan
    Faculty of Life Sciences, Moffat Building, University of Manchester, Manchester, United Kingdom
    Clin Exp Optom 93:164-74. 2010
  4. doi request reprint Peripheral refraction measurement: does it matter if one turns the eye or the head?
    Hema Radhakrishnan
    Faculty of Life Sciences, Moffat Building, University of Manchester, P O Box 88, Sackville Street, Manchester M60 1QD, UK
    Ophthalmic Physiol Opt 28:73-82. 2008
  5. doi request reprint Corneal biomechanical properties and their correlates with refractive error
    Hema Radhakrishnan
    Faculty of Life Sciences, University of Manchester, Manchester, United Kingdom
    Clin Exp Optom 95:12-8. 2012
  6. ncbi request reprint Dynamics of accommodative facility in myopes
    Hema Radhakrishnan
    Faculty of Life Sciences, The University of Manchester, Manchester, United Kingdom
    Invest Ophthalmol Vis Sci 48:4375-82. 2007
  7. ncbi request reprint Refractive changes associated with oblique viewing and reading in myopes and emmetropes
    Hema Radhakrishnan
    Faculty of Life Sciences, University of Manchester, Manchester, UK
    J Vis 7:5. 2007
  8. ncbi request reprint Age-related changes in static accommodation and accommodative miosis
    Hema Radhakrishnan
    Optometry and Neuroscience, Faculty of Life Sciences, University of Manchester, Manchester M60 1QD, UK
    Ophthalmic Physiol Opt 27:342-52. 2007
  9. ncbi request reprint Changes in astigmatism with accommodation
    Hema Radhakrishnan
    Faculty of Life Sciences, Moffat Building, University of Manchester, Manchester, UK
    Ophthalmic Physiol Opt 27:275-80. 2007
  10. pmc Biomechanical properties of human corneas following low- and high-intensity collagen cross-linking determined with scanning acoustic microscopy
    Ithar M Beshtawi
    University of Manchester, Manchester, United Kingdom
    Invest Ophthalmol Vis Sci 54:5273-80. 2013

Collaborators

Detail Information

Publications48

  1. doi request reprint Peripheral refractive changes associated with myopia progression
    Hema Radhakrishnan
    CorrFaculty of Life Sciences, University of Manchester, Carys Bannister Building, Manchester, UK M13 9PL
    Invest Ophthalmol Vis Sci 54:1573-81. 2013
    ..To evaluate the changes in peripheral refraction profiles associated with myopia progression and treatment modalities used in the Cambridge Anti-Myopia Study...
  2. ncbi request reprint Age-related changes in ocular aberrations with accommodation
    Hema Radhakrishnan
    Faculty of Life Sciences, University of Manchester, Manchester, UK
    J Vis 7:11.1-21. 2007
    ..The change with age in the relationship between aberration and accommodation is interpreted in terms of the changing gradients of refractive index and surface curvatures of the crystalline lens...
  3. ncbi request reprint Dynamics of ocular aberrations in keratoconus
    Hema Radhakrishnan
    Faculty of Life Sciences, Moffat Building, University of Manchester, Manchester, United Kingdom
    Clin Exp Optom 93:164-74. 2010
    ..The aim was to investigate the fluctuations in monochromatic ocular aberrations with accommodation and tear-film changes in moderate keratoconic eyes...
  4. doi request reprint Peripheral refraction measurement: does it matter if one turns the eye or the head?
    Hema Radhakrishnan
    Faculty of Life Sciences, Moffat Building, University of Manchester, P O Box 88, Sackville Street, Manchester M60 1QD, UK
    Ophthalmic Physiol Opt 28:73-82. 2008
    ..5 min and 30 degrees respectively), the results fail to confirm the occurrence of large differences in peripheral refraction when measurements are made with eye turn rather than head turn...
  5. doi request reprint Corneal biomechanical properties and their correlates with refractive error
    Hema Radhakrishnan
    Faculty of Life Sciences, University of Manchester, Manchester, United Kingdom
    Clin Exp Optom 95:12-8. 2012
    ..The aim was to study the link between refractive error and corneal biomechanical properties...
  6. ncbi request reprint Dynamics of accommodative facility in myopes
    Hema Radhakrishnan
    Faculty of Life Sciences, The University of Manchester, Manchester, United Kingdom
    Invest Ophthalmol Vis Sci 48:4375-82. 2007
    ..To evaluate the dynamic changes in refraction during the accommodative facility test in myopes and emmetropes...
  7. ncbi request reprint Refractive changes associated with oblique viewing and reading in myopes and emmetropes
    Hema Radhakrishnan
    Faculty of Life Sciences, University of Manchester, Manchester, UK
    J Vis 7:5. 2007
    ..However, the results from Experiment 2 suggest that any such pressures during short-term reading tasks have no significant impact on the axial refraction...
  8. ncbi request reprint Age-related changes in static accommodation and accommodative miosis
    Hema Radhakrishnan
    Optometry and Neuroscience, Faculty of Life Sciences, University of Manchester, Manchester M60 1QD, UK
    Ophthalmic Physiol Opt 27:342-52. 2007
    ..Hence it cannot be used to support or refute particular theories of presbyopia...
  9. ncbi request reprint Changes in astigmatism with accommodation
    Hema Radhakrishnan
    Faculty of Life Sciences, Moffat Building, University of Manchester, Manchester, UK
    Ophthalmic Physiol Opt 27:275-80. 2007
    ..036 DC at axis 176 deg for each dioptre of accommodation response. It is speculated that these changes might reflect increases in lens tilt about a horizontal axis, caused by the combined effects of a slacker zonule and gravity...
  10. pmc Biomechanical properties of human corneas following low- and high-intensity collagen cross-linking determined with scanning acoustic microscopy
    Ithar M Beshtawi
    University of Manchester, Manchester, United Kingdom
    Invest Ophthalmol Vis Sci 54:5273-80. 2013
    ..To assess and compare changes in the biomechanical properties of the cornea following different corneal collagen cross-linking protocols using scanning acoustic microscopy (SAM)...
  11. doi request reprint The Cambridge Anti-myopia Study: variables associated with myopia progression
    Holly Price
    PhD Vision and Eye Research Unit HP, PMA, RC, SR, BT, Postgraduate Medical Institute, Department of Vision and Hearing Sciences, Anglia Ruskin University, Cambridge, United Kingdom Vision Cooperative Research Centre HP, PMA, HR, RC, SR, BT, DJO, Sydney, Australia Faculty of Life Sciences HR, University of Manchester, Manchester, United Kingdom School of Optometry AS, National Institute of Ophthalmic Sciences, Academic arm of The Tun Hussein Onn National Eye Hospital, Malaysia and Cardiff Metropolitan University, Cardiff DJO, Wales, United Kingdom
    Optom Vis Sci 90:1274-83. 2013
    ..To identify variables associated with myopia progression and to identify any interaction between accommodative function, myopia progression, age, and treatment effect in the Cambridge Anti-Myopia Study...
  12. doi request reprint Optical quality for keratoconic eyes with conventional RGP lens and simulated, customised contact lens corrections: a comparison
    Amit Jinabhai
    Faculty of Life Sciences, The University of Manchester, Manchester, UK
    Ophthalmic Physiol Opt 32:200-12. 2012
    ....
  13. doi request reprint Binocular saccades in myopes and emmetropes
    Andreas Hartwig
    Faculty of Life Science, University of Manchester, Manchester, United Kingdom
    Optom Vis Sci 90:980-7. 2013
    ..Individual saccadic eye movement parameters were also compared with subjective refraction and axial length data...
  14. doi request reprint Biomechanical properties of corneal tissue after ultraviolet-A-riboflavin crosslinking
    Ithar M Beshtawi
    Faculty of Life Sciences, The University of Manchester, Manchester, United Kingdom
    J Cataract Refract Surg 39:451-62. 2013
    ..The increase in availability and popularity of the CXL technique accentuates the requirement for reliable and accurate techniques for measuring corneal biomechanical properties before and after treatment...
  15. doi request reprint Visual performance and optical quality with soft lenses in keratoconus patients
    Amit Jinabhai
    Faculty of Life Sciences, The University of Manchester, Manchester, UK
    Ophthalmic Physiol Opt 32:100-16. 2012
    ..To assess visual performance and ocular aberrations in keratoconic patients using toric soft contact lenses (SCL), rigid-gas-permeable (RGP) contact lenses and spectacle lens correction...
  16. doi request reprint Corneal changes after suspending contact lens wear in early pellucid marginal corneal degeneration and moderate keratoconus
    Amit Jinabhai
    Department of Life Sciences, The University of Manchester, Manchester, United Kingdom
    Eye Contact Lens 37:99-105. 2011
    ..Alterations in central corneal power and axes, central corneal thickness, and corneal topography were also explored...
  17. doi request reprint Changes in refraction, ocular aberrations, and corneal structure after suspending rigid gas-permeable contact lens wear in keratoconus
    Amit Jinabhai
    Faculty of Life Sciences, University of Manchester, England, United Kingdom
    Cornea 31:500-8. 2012
    ..Alterations in the anterior surface, central corneal powers and axes, and central corneal thickness were also explored...
  18. doi request reprint Effect of target spatial frequency on accommodative response in myopes and emmetropes
    John Taylor
    Faculty of Life Sciences, Moffat Building, University of Manchester, Manchester, UK
    J Vis 9:16.1-14. 2009
    ..For each target the two refractive groups showed similar accommodative behavior...
  19. doi request reprint Repeatability of corneal and ocular aberration measurements and changes in aberrations over one week
    Marco A Miranda
    Faculty of Life Sciences, The University of Manchester, United Kingdom
    Clin Exp Optom 92:253-66. 2009
    ..The aim was to study the variability in corneal and ocular aberrations in the human eye over one week and to determine the impact of age on corneal and crystalline lens aberrations and on the variability of these measurements...
  20. doi request reprint Working distance and eye and head movements during near work in myopes and non-myopes
    Andreas Hartwig
    Faculty of Life Sciences, University of Manchester, Manchester, United Kingdom
    Clin Exp Optom 94:536-44. 2011
    ..The present study aims to analyse head and eye movements in myopes and non-myopes for near-vision tasks...
  21. doi request reprint Peripheral aberration measurements: elliptical pupil transformation and variations in horizontal coma across the visual field
    Andreas Hartwig
    Faculty of Life Sciences, University of Manchester, Manchester, United Kingdom
    Clin Exp Optom 94:443-51. 2011
    ..The aim was to determine the critical eccentricity at which two methods of elaborating peripheral wavefront measurements are significantly different and to characterise horizontal coma in healthy young adults...
  22. doi request reprint Repeatability of ocular aberration measurements in patients with keratoconus
    Amit Jinabhai
    Faculty of Life Sciences, The University of Manchester, Manchester, UK
    Ophthalmic Physiol Opt 31:588-94. 2011
    ..To explore the repeatability of lower-order and higher-order ocular aberrations measured in patients with keratoconus...
  23. doi request reprint A comparison between subjective refraction and aberrometry-derived refraction in keratoconus patients and control subjects
    Amit Jinabhai
    Faculty of Life Sciences, The University of Manchester, Manchester, United Kingdom
    Curr Eye Res 35:703-14. 2010
    ....
  24. doi request reprint Visual acuity and ocular aberrations with different rigid gas permeable lens fittings in keratoconus
    Amit Jinabhai
    Department of Life Sciences, The University of Manchester, Manchester, UK
    Eye Contact Lens 36:233-7. 2010
    ....
  25. doi request reprint Correlations between refractive error and biometric parameters in human eyes using the LenStar 900
    Clare O'Donnell
    Faculty of Life Sciences, University of Manchester, Manchester, UK
    Cont Lens Anterior Eye 34:26-31. 2011
    ..To investigate the relationship between refractive error and ocular biometry in healthy subjects using a new optical low coherence reflectometry device...
  26. doi request reprint Analysis of head position used by myopes and emmetropes when performing a near-vision reading task
    Andreas Hartwig
    Faculty of Life Sciences, The University of Manchester, UK
    Vision Res 51:1712-7. 2011
    ..Overall, while no differences in mean head posture were found between myopes and emmetropes, there was some evidence that head posture and movement during reading may differ in progressing myopes...
  27. doi request reprint Higher-order aberrations and anisometropia
    Andreas Hartwig
    Faculty of Life Sciences, University of Manchester, UK
    Curr Eye Res 38:215-9. 2013
    ..One consideration is whether higher-order aberrations (HOA) influence myopization. More knowledge of optics in anisometropic eyes might give further insight into the development of refractive error...
  28. doi request reprint Comparison of central corneal thickness and anterior chamber depth measured using LenStar LS900, Pentacam, and Visante AS-OCT
    Clare Oʼdonnell
    Optegra Eye Sciences, Optegra Manchester Eye Hospital, Manchester, United Kingdom
    Cornea 31:983-8. 2012
    ..To compare central corneal thickness (CCT) and anterior chamber depth (ACD) measured using 3 different techniques...
  29. doi request reprint Forward light scatter and contrast sensitivity in keratoconic patients
    Amit Jinabhai
    The University of Manchester, Faculty of Life Sciences, Manchester, England, UK
    Cont Lens Anterior Eye 35:22-7. 2012
    ..The aim of this study was to obtain intraocular forward light scatter (FLS) data in keratoconus patients and to explore possible relationships with contrast sensitivity...
  30. doi request reprint Accommodation, pupil diameter and myopia
    W Neil Charman
    Faculty of Life Sciences, University of Manchester, Manchester, UK
    Ophthalmic Physiol Opt 29:72-9. 2009
    ..Interestingly, those subjects whose response/stimulus curves had a higher slope tended to display greater accommodative miosis, irrespective of their refractive error...
  31. doi request reprint Aberrometry in clinical practice: case series
    Hema Radhakrishnan
    Faculty of Life Sciences, University of Manchester, Manchester M60 1QD, United Kingdom
    Cont Lens Anterior Eye 31:207-11. 2008
    ..Measurement of ocular aberrations can provide an improved description of the optical quality of the eye and hence can be useful to the clinician in evaluating eyes with optical abnormalities...
  32. ncbi request reprint Repeatability of corneal thickness measured using an Oculus Pentacam
    Marco A Miranda
    Faculty of Life Sciences, The University of Manchester, United Kingdom
    Optom Vis Sci 86:266-72. 2009
    ..To evaluate the repeatability of corneal thickness measurements over time, obtained with an Oculus Pentacam...
  33. pmc Small-aperture monovision and the Pulfrich experience: absence of neural adaptation effects
    Sotiris Plainis
    Institute of Vision and Optics IVO, University of Crete, Heraklion, Greece Faculty of Life Sciences, The University of Manchester, Manchester, United Kingdom
    PLoS ONE 8:e75987. 2013
    ..To explore whether adaptation reduces the interocular visual latency differences and the induced Pulfrich effect caused by the anisocoria implicit in small-aperture monovision...
  34. doi request reprint Scanning acoustic microscopy for mapping the microelastic properties of human corneal tissue
    Ithar M Beshtawi
    Carys Bannister Building, Faculty of Life Sciences, The University of Manchester, Manchester, UK
    Curr Eye Res 38:437-44. 2013
    ..To assess the feasibility of applying scanning acoustic microscopy (SAM) on UV cross-linked corneal tissue for mapping and analyzing its biomechanical properties...
  35. ncbi request reprint Problems in the measurement of wavefront aberration for eyes implanted with diffractive bifocal and multifocal intraocular lenses
    W Neil Charman
    Faculty of Life Sciences, University of Manchester, Manchester, United Kingdom
    J Refract Surg 24:280-6. 2008
    ..To determine the origin of the wavefront aberration as measured in eyes fitted with diffractive intraocular lenses (IOLs)...
  36. doi request reprint Pellucid corneal marginal degeneration: A review
    Amit Jinabhai
    The University of Manchester, England, UK
    Cont Lens Anterior Eye 34:56-63. 2011
    ..This review describes the clinical features of PMD, its differential diagnosis and various management strategies presently available...
  37. ncbi request reprint Repeatability of oculus pentacam metrics derived from corneal topography
    Marco A Miranda
    Faculty of Life Sciences, University of Manchester, Manchester, United Kingdom
    Cornea 28:657-66. 2009
    ..To estimate the variability of Scheimpflug imaging measurements over a 1-week period and to determine the impact of age on the measurements and on the variability of the parameters in the study...
  38. doi request reprint Peripheral refraction and the development of refractive error: a review
    W Neil Charman
    Faculty of Life Sciences, University of Manchester, Manchester M60 1QD, UK
    Ophthalmic Physiol Opt 30:321-38. 2010
    ....
  39. doi request reprint Accommodative response to peripheral stimuli in myopes and emmetropes
    Andreas Hartwig
    Faculty of Life Sciences, University of Manchester, Manchester, UK
    Ophthalmic Physiol Opt 31:91-9. 2011
    ..10 ± 1.72 D, median -1.63 D, range -0.83 to -6.00 D) and 10 emmetropes (mean spherical equivalent error -0.02 ± 0.35 D, median +0.08 D, range -0.50 to +0.50 D)...
  40. doi request reprint Visual function through 4 contact lens-based pinhole systems for presbyopia
    Santiago García-Lázaro
    Optometry Research Group, Optics Department, University of Valencia, Burjassot, Spain
    J Cataract Refract Surg 38:858-65. 2012
    ..To evaluate the effects of different contact lens-based artificial pupil designs on visual performance...
  41. ncbi request reprint Changes in accommodation and ocular aberration with simultaneous vision multifocal contact lenses
    Javier Ruiz-Alcocer
    Optometry Research Group GIO, Optics Department, University of Valencia, Valencia, Spain
    Eye Contact Lens 38:288-94. 2012
    ..The aim of this study was to evaluate ocular aberration changes through different simultaneous vision multifocal contact lenses (CLs)...
  42. doi request reprint Visual comparison of an artificial pupil contact lens to monovision
    Santiago García-Lázaro
    Optometry Research Group GIO, Optics Department, Faculty of Physics, University of Valencia, Valencia, Spain
    Optom Vis Sci 89:E1022-9. 2012
    ..To assess and compare the effects of contact-lens based artificial pupil design and monovision correction on visual performance...
  43. ncbi request reprint Contrast detection in noise with positive and negative defocus in myopes
    Hema Radhakrishnan
    Faculty of Life Sciences, The University of Manchester, Moffat Building, P O Box 88, Manchester M60 1QD, UK
    Vision Res 46:2949-55. 2006
    ..We investigate whether the asymmetrical loss shown by myopes to defocus can be explained by changes in sampling efficiency or equivalent noise, or both...
  44. ncbi request reprint Can we measure wave aberration in patients with diffractive IOLs?
    W Neil Charman
    J Cataract Refract Surg 33:1997. 2007
  45. ncbi request reprint Repeatability and validity of the PowerRefractor and the Nidek AR600-A in an adult population with healthy eyes
    Peter M Allen
    Department of Optometry and Ophthalmic Dispensing, Anglia Polytechnic University, Cambridge, United Kingdom
    Optom Vis Sci 80:245-51. 2003
    ..We suggest some improvements to the PowerRefractor measurement technique to standardize its clinical use and to improve accuracy...
  46. ncbi request reprint Peripheral refraction for distance and near vision in emmetropes and myopes
    Richard Calver
    Department of Optometry and Ophthalmic Dispensing, Anglia Ruskin University, East Road, Cambridge CB1 1PT, UK
    Ophthalmic Physiol Opt 27:584-93. 2007
    ..The effect of viewing distance on astigmatism or Mean Spherical Equivalent error was not significant. Our results do not support the view that myopia is associated with changes in peripheral refraction during distance or near vision...
  47. ncbi request reprint Effect of positive and negative defocus on contrast sensitivity in myopes and non-myopes
    Hema Radhakrishnan
    Department of Optometry and Ophthalmic Dispensing, Anglia Polytechnic University, East Road, Cambridge CB1 1PT, UK
    Vision Res 44:1869-78. 2004
    ..The observed asymmetry in contrast sensitivity with positive and negative defocus in myopes may be linked to the altered accommodative response observed in this group...
  48. ncbi request reprint Unequal reduction in visual acuity with positive and negative defocusing lenses in myopes
    Hema Radhakrishnan
    Department of Optometry and Ophthalmic Dispensing, Anglia Polytechnic University, Cambridge, United Kingdom
    Optom Vis Sci 81:14-7. 2004
    ..The reduced accommodative response known to occur in myopes may be due to the relatively small effect that negative lens blur has on their visual acuity...