D Fonn

Summary

Affiliation: University of Waterloo
Country: Canada

Publications

  1. ncbi The measurement of corneal epithelial thickness in response to hypoxia using optical coherence tomography
    Jianhua Wang
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, Ontario, Canada
    Am J Ophthalmol 133:315-9. 2002
  2. ncbi Hydrogel lens dehydration and subjective comfort and dryness ratings in symptomatic and asymptomatic contact lens wearers
    D Fonn
    Centre for Contact Lens Research, University of Waterloo, Ontario, Canada
    Optom Vis Sci 76:700-4. 1999
  3. ncbi Corneal oxygen deficiency
    Desmond Fonn
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
    Eye Contact Lens 31:23-7. 2005
  4. ncbi Dryness and discomfort with silicone hydrogel contact lenses
    Desmond Fonn
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, Ontario, Canada
    Eye Contact Lens 29:S101-4; discussion S115-8, S192-4. 2003
  5. ncbi Targeting contact lens induced dryness and discomfort: what properties will make lenses more comfortable
    Desmond Fonn
    School of Optometry, University of Waterloo, Waterloo, ON, Canada
    Optom Vis Sci 84:279-85. 2007
  6. doi Corneal staining as a response to contact lens wear
    Desmond Fonn
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, ON, Canada
    Eye Contact Lens 36:318-21. 2010
  7. ncbi Sympathetic swelling response of the control eye to soft lenses in the other eye
    D Fonn
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Ontario, Canada
    Invest Ophthalmol Vis Sci 40:3116-21. 1999
  8. ncbi Changes in myopic refractive error with nine months' extended wear of hydrogel lenses with high and low oxygen permeability
    K A Dumbleton
    Centre for Contact Lens Research, University of Waterloo, Ontario, Canada
    Optom Vis Sci 76:845-9. 1999
  9. ncbi The effects of six months of contact lens wear on the tear film, ocular surfaces, and symptoms of presbyopes
    R Du Toit
    Centre for Contact Lens Research, University of Waterloo, Ontario, Canada
    Optom Vis Sci 78:455-62. 2001
  10. doi Malleability of the ocular surface in response to mechanical stress induced by orthokeratology contact lenses
    Fenghe Lu
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, Ontario, Canada
    Cornea 27:133-41. 2008

Collaborators

Detail Information

Publications55

  1. ncbi The measurement of corneal epithelial thickness in response to hypoxia using optical coherence tomography
    Jianhua Wang
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, Ontario, Canada
    Am J Ophthalmol 133:315-9. 2002
    ..To determine if corneal epithelial thickness increases in association with corneal edema induced by wearing soft contact lenses during eye closure...
  2. ncbi Hydrogel lens dehydration and subjective comfort and dryness ratings in symptomatic and asymptomatic contact lens wearers
    D Fonn
    Centre for Contact Lens Research, University of Waterloo, Ontario, Canada
    Optom Vis Sci 76:700-4. 1999
    ..To determine whether lens dehydration correlates with discomfort, dryness, and noninvasive tear break-up time in symptomatic and asymptomatic contact lens wearers and whether dehydration of the two lens types varies...
  3. ncbi Corneal oxygen deficiency
    Desmond Fonn
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
    Eye Contact Lens 31:23-7. 2005
    ..To compare the ocular effects of low Dk hydrogel and high Dk silicone hydrogel contact lenses...
  4. ncbi Dryness and discomfort with silicone hydrogel contact lenses
    Desmond Fonn
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, Ontario, Canada
    Eye Contact Lens 29:S101-4; discussion S115-8, S192-4. 2003
    ..The purpose of this study was to determine whether symptoms of dryness and discomfort are experienced differently with silicone hydrogel lenses compared to conventional hydrogels, in symptomatic and asymptomatic subjects...
  5. ncbi Targeting contact lens induced dryness and discomfort: what properties will make lenses more comfortable
    Desmond Fonn
    School of Optometry, University of Waterloo, Waterloo, ON, Canada
    Optom Vis Sci 84:279-85. 2007
    ..This review describes the dryness and discomfort effects of contact lenses and how contact lens properties with novel solutions have the potential for eliminating or alleviating these symptoms...
  6. doi Corneal staining as a response to contact lens wear
    Desmond Fonn
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, ON, Canada
    Eye Contact Lens 36:318-21. 2010
    ..To review the effects of contact lenses on the corneal surface...
  7. ncbi Sympathetic swelling response of the control eye to soft lenses in the other eye
    D Fonn
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Ontario, Canada
    Invest Ophthalmol Vis Sci 40:3116-21. 1999
    ..To compare central corneal swelling and light scatter after 8 hours of sleep in eyes wearing high- and low-Dk hydrogel lenses and to the contralateral control eyes...
  8. ncbi Changes in myopic refractive error with nine months' extended wear of hydrogel lenses with high and low oxygen permeability
    K A Dumbleton
    Centre for Contact Lens Research, University of Waterloo, Ontario, Canada
    Optom Vis Sci 76:845-9. 1999
    ..The purpose of this study was to compare the refractive changes induced over a period of 9 months' extended wear with high-Dk fluorosiloxane hydrogel lenses and low-Dk hydrogel lenses...
  9. ncbi The effects of six months of contact lens wear on the tear film, ocular surfaces, and symptoms of presbyopes
    R Du Toit
    Centre for Contact Lens Research, University of Waterloo, Ontario, Canada
    Optom Vis Sci 78:455-62. 2001
    ..To assess the tear film, ocular surfaces, and symptoms of ocular discomfort in a presbyopic population before and after contact lens wear...
  10. doi Malleability of the ocular surface in response to mechanical stress induced by orthokeratology contact lenses
    Fenghe Lu
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, Ontario, Canada
    Cornea 27:133-41. 2008
    ....
  11. ncbi Recovery from hyperemia after overnight wear of low and high transmissibility hydrogel lenses
    R Du Toit
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Canada
    Curr Eye Res 22:68-73. 2001
    ..This suggests that the slower recovery from hyperemia may be affected by the lower oxygen transmissibility of the LDk lens...
  12. ncbi Corneal refractive therapy with different lens materials, part 2: effect of oxygen transmissibility on corneal shape and optical characteristics
    Fenghe Lu
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Canada corrected
    Optom Vis Sci 84:349-56. 2007
    ..To compare the effects of two different oxygen transmissible (Dk/t) lenses on corneal shape and optical performance after one night of corneal refractive therapy (CRT(R)) for myopia...
  13. ncbi Epithelial inclusions in association with mucin ball development in high-oxygen permeability hydrogel lenses
    N Pritchard
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Ontario, Canada
    Optom Vis Sci 77:68-72. 2000
    ....
  14. ncbi Vascular response to extended wear of hydrogel lenses with high and low oxygen permeability
    K A Dumbleton
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Ontario, Canada
    Optom Vis Sci 78:147-51. 2001
    ....
  15. ncbi Corneal refractive therapy with different lens materials, part 1: corneal, stromal, and epithelial thickness changes
    Sameena Haque
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, Ontario, Canada
    Optom Vis Sci 84:343-8. 2007
    ..Change in thickness of the total cornea, stroma, and epithelium was measured across the horizontal meridian using optical coherence tomography (OCT)...
  16. ncbi The ocular response to extended wear of a high Dk silicone hydrogel contact lens
    Desmond Fonn
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada
    Clin Exp Optom 85:176-82. 2002
    ..A four-month extended wear clinical trial was conducted to compare the ocular effects of a high Dk Balafilcon A silicone hydrogel lens and a low Dk HEMA 38.6 per cent H20 soft lens...
  17. ncbi The relationship between the treatment zone diameter and visual, optical and subjective performance in Corneal Refractive Therapy lens wearers
    Fenghe Lu
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, ON, Canada
    Ophthalmic Physiol Opt 27:568-78. 2007
    ..To investigate the stability of the treatment zone (TZ) size during Corneal Refractive Therapy (CRT) over 4 weeks of lens wear, and to determine the relationship between TZ diameter and visual, optical and subjective performance...
  18. ncbi Corneal shape and optical performance after one night of corneal refractive therapy for hyperopia
    Fenghe Lu
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Canada corrected
    Optom Vis Sci 84:357-64. 2007
    ..To investigate the corneal shape and optical performance following one night of Corneal Refractive Therapy for hyperopia (CRTH)...
  19. ncbi Assessment of variation in bulbar conjunctival redness, temperature, and blood flow
    Stephanie Duench
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, 200 University Avenue, Waterloo, Ontario, Canada
    Optom Vis Sci 84:511-6. 2007
    ..To assess the diurnal variation in bulbar conjunctival redness, conjunctival temperature, and conjunctival blood flow...
  20. doi Dry eye symptoms assessed by four questionnaires
    Trefford L Simpson
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, Canada
    Optom Vis Sci 85:692-9. 2008
    ....
  21. doi Patient use of smartphones to communicate subjective data in clinical trials
    Craig A Woods
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, Ontario, Canada
    Optom Vis Sci 88:290-4. 2011
    ..This technical note reports on the utility of the BlackBerry smartphone to collect such data and why such a system provides advantages over other methods to report subjective ratings in clinical studies...
  22. doi Comfort and adaptation to silicone hydrogel lenses for daily wear
    Kathryn A Dumbleton
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, Ontario, Canada
    Eye Contact Lens 34:215-23. 2008
    ..To investigate initial comfort and adaptation of currently successful low oxygen transmissibility soft lens wearers refitted with silicone hydrogel (SH) lenses for daily wear...
  23. doi Multipurpose disinfecting solutions and their interactions with a silicone hydrogel lens
    Luigina Sorbara
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, Ontario, Canada
    Eye Contact Lens 35:92-7. 2009
    ..Ocular responses and subjective responses were monitored with each lens-care system combination...
  24. doi An investigation of the efficacy of a novel ocular lubricant
    Kathy Dumbleton
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, Canada
    Eye Contact Lens 35:149-55. 2009
    ....
  25. ncbi Wavefront-guided LASIK for myopia: effect on visual acuity, contrast sensitivity, and higher order aberrations
    Nancy J Keir
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, Ontario, Canada
    J Refract Surg 25:524-33. 2009
    ..To determine the impact of wavefront-guided LASIK for myopia with or without astigmatism on high and low contrast best spectacle-corrected visual acuity (BSCVA), photopic and mesopic contrast sensitivity, and higher order aberrations...
  26. doi Early symptomatic presbyopes--what correction modality works best?
    Jill Woods
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, Ontario, Canada
    Eye Contact Lens 35:221-6. 2009
    ..To compare the performance of a low-addition silicone hydrogel multifocal soft lens with other soft lens correction options in a group of habitual soft lens wearers of distance correction who are symptomatic of early presbyopia...
  27. doi Compliance with contact lens replacement in Canada and the United States
    Kathryn Dumbleton
    Centre for Contact Lens Research, University of Waterloo, Waterloo, Ontario, Canada
    Optom Vis Sci 87:131-9. 2010
    ..S. and to compare noncompliance (NC) with manufacturer recommended RF by the ECP and patient, and the reasons given for NC...
  28. doi Comfort and vision with silicone hydrogel lenses: effect of compliance
    Kathryn Dumbleton
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, Ontario, Canada
    Optom Vis Sci 87:421-5. 2010
    ..The purpose of this analysis was to investigate the effect of compliance with MRRF on comfort and vision in SH wearers...
  29. doi Metrics of the normal cornea: anterior segment imaging with the Visante OCT
    Luigina Sorbara
    Centre for Contact Lens Research, University of Waterloo, Waterloo, Ontario, Canada
    Clin Exp Optom 93:150-6. 2010
    ..Also, the distribution of these variables in the normal eye and how well they correlated to each other were determined...
  30. doi Patient and practitioner compliance with silicone hydrogel and daily disposable lens replacement in the United States
    Kathy Dumbleton
    Centre for Contact Lens Research, University of Waterloo, Canada
    Eye Contact Lens 35:164-71. 2009
    ....
  31. ncbi Comparison of an objective method of measuring bulbar redness to the use of traditional grading scales
    Luigina Sorbara
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
    Cont Lens Anterior Eye 30:53-9. 2007
    ..This report compares hyperaemia after 1 week of daily wear (baseline) with redness measured after 6 months of overnight wear...
  32. ncbi Successful monovision contact lens wearers refitted with bifocal contact lenses
    Ping Situ
    Centre ofr Contact Lens Research, University of Waterloo, Waterloo, Ontario, Canada
    Eye Contact Lens 29:181-4. 2003
    ..Should successful monovision contact lens wearers be refitted with bifocal lenses?..
  33. ncbi Effect of lens base curve on subjective comfort and assessment of fit with silicone hydrogel continuous wear contact lenses
    Kathryn A Dumbleton
    Centre for Contact Lens Research, University of Waterloo, Ontario, Canada
    Optom Vis Sci 79:633-7. 2002
    ..To study the effect of base curve on subjective comfort of silicone hydrogel extended wear lenses...
  34. ncbi Reduction of myopia from corneal refractive therapy
    Luigina Sorbara
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, Ontario, Canada
    Optom Vis Sci 82:512-8. 2005
    ..Refractive error, keratometry, high and low contrast acuity, and subjective vision after 28 days of using CRT contact lenses were measured...
  35. ncbi Topographical thickness of the epithelium and total cornea after overnight wear of reverse-geometry rigid contact lenses for myopia reduction
    Jianhua Wang
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, Ontario, Canada
    Invest Ophthalmol Vis Sci 44:4742-6. 2003
    ..To investigate topographical thickness changes of the epithelium and total cornea measured with optical coherence tomography (OCT) after overnight wear of rigid gas-permeable lenses...
  36. ncbi Overnight corneal swelling with silicone hydrogel contact lenses with high oxygen transmissibility
    Amir M Moezzi
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, Ontario, Canada
    Eye Contact Lens 32:277-80. 2006
    ..To compare central corneal swelling after 8 hours of sleep in eyes wearing 2 different silicone hydrogel lenses with high oxygen transmissibility...
  37. ncbi Objective and subjective responses in patients refitted to daily-wear silicone hydrogel contact lenses
    Kathryn Dumbleton
    Centre for Contact Lens Research, University of Waterloo, Waterloo, Ontario, Canada
    Optom Vis Sci 83:758-68. 2006
    ..The purpose of this study was to investigate the clinical performance and physiological responses in a group of successful long-term wearers of conventional hydrogel lenses when refitted with DW SiH contact lenses...
  38. ncbi New technologies to assess lens-mediated effects of the cornea
    Desmond Fonn
    Center for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, Ontario, Canada
    Eye Contact Lens 33:364-70; discussion 382. 2007
    ..This article describes some of the newer techniques and, specifically, the application of optical coherence tomography, confocal microscopy, and esthesiometry...
  39. doi Conjunctival and corneal pneumatic sensitivity is associated with signs and symptoms of ocular dryness
    Ping Situ
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, Ontario, Canada
    Invest Ophthalmol Vis Sci 49:2971-6. 2008
    ..To investigate the relationships of dry eye symptoms and corneal and conjunctival sensitivity to pneumatic stimulation, tear film stability, and clinical ocular surface characteristics in symptomatic and asymptomatic subjects...
  40. ncbi Corneal and epithelial thickness changes after 4 weeks of overnight corneal refractive therapy lens wear, measured with optical coherence tomography
    Sameena Haque
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, Ontario, N2L 3G1 Canada
    Eye Contact Lens 30:189-93; discussion 205-6. 2004
    ..To investigate thickness changes of the total cornea and epithelium across the horizontal corneal meridian after 4 weeks of overnight corneal refractive therapy (CRT) rigid contact lens (Paragon Vision Sciences, Mesa, AZ) wear...
  41. doi Conjunctival and corneal hyperesthesia in subjects with dryness symptoms
    Ping Situ
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, Ontario, Canada
    Optom Vis Sci 85:867-72. 2008
    ..To compare conjunctival and corneal sensitivity in noncontact lens wearing subjects with and without symptoms of ocular dryness, stratified by age and gender...
  42. doi Measurement of the refractive index of soft contact lenses during wear
    Jalaiah Varikooty
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, ON, Canada
    Eye Contact Lens 36:2-5. 2010
    ..To determine whether the refractive index (RI) of a soft contact lens can be evaluated using refractometry while the lens remains on the eye and to compare this with more traditional ex vivo RI measurements...
  43. ncbi Validity of pachymetric measurements by manipulating the acoustic factor of Orbscan II
    Fenghe Lu
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Canada
    Eye Contact Lens 32:78-83. 2006
    ..To assess the validity of pachymetric measurements by examining the constancy of the acoustic factor (AF) of the Orbscan II (Orbtek, Bausch & Lomb, Rochester, NY) after overnight rigid gas-permeable (RGP) contact lens wear...
  44. ncbi Eccentric variation of corneal sensitivity to pneumatic stimulation at different temperatures and with CO2
    P Situ
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, 200 University Ave W, Waterloo, Ontario, N2L 3G1, Canada
    Exp Eye Res 85:400-5. 2007
    ..Sensitivity across the cornea using pneumatic stimuli at different temperatures and chemical stimuli varied only slightly. These patterns of variation are different to what has been previously reported using Cochet-Bonnet esthesiometry...
  45. ncbi Relation between optical coherence tomography and optical pachymetry measurements of corneal swelling induced by hypoxia
    Jianhua Wang
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Ontario, Canada
    Am J Ophthalmol 134:93-8. 2002
    ..To determine the relation between optical coherence tomography (OCT) and optical pachymetry (OP) measurements of corneal swelling induced by hypoxia...
  46. ncbi Contact lens-induced corneal swelling and surface changes measured with the Orbscan II corneal topographer
    Amir M Moezzi
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, Ontario, Canada
    Optom Vis Sci 81:189-93. 2004
    ....
  47. doi Epithelial thickness changes from the induction of myopia with CRTH RGP contact lenses
    Sameena Haque
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Ontario, Canada
    Invest Ophthalmol Vis Sci 49:3345-50. 2008
    ..To investigate changes in epithelial thickness after overnight wear of CRTH rigid gas-permeable (RGP) lenses (Paragon Vision Sciences, Mesa, AZ) for the correction of hyperopia...
  48. ncbi Objective measurements of corneal light-backscatter during corneal swelling, by optical coherence tomography
    Jianhua Wang
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, Ontario, Canada
    Invest Ophthalmol Vis Sci 45:3493-8. 2004
    ..To demonstrate that corneal light-backscatter can be measured objectively during corneal swelling by optical coherence tomography (OCT)...
  49. ncbi Topographical thickness of the epithelium and total cornea after hydrogel and PMMA contact lens wear with eye closure
    Jianhua Wang
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, Ontario, Canada
    Invest Ophthalmol Vis Sci 44:1070-4. 2003
    ....
  50. ncbi Diurnal variation of corneal sensitivity and thickness
    Renee du Toit
    Centre for Contact Lens Research, University of Waterloo, Ontario, Canada
    Cornea 22:205-9. 2003
    ..To measure the diurnal variation of central corneal sensitivity and thickness over 24 hours...
  51. ncbi Precorneal and pre- and postlens tear film thickness measured indirectly with optical coherence tomography
    Jianhua Wang
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, Ontario, Canada
    Invest Ophthalmol Vis Sci 44:2524-8. 2003
    ..To demonstrate the feasibility of indirectly measuring the precorneal tear film thickness and pre- and postlens tear film (PLTF) thickness using optical coherence tomography (OCT)...
  52. ncbi Optical coherence tomography of the anterior segment
    Trefford Simpson
    Centre for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, Ontario, Canada
    Ocul Surf 6:117-27. 2008
    ..We also highlight previous and current publications on nonclinical and clinical uses of the device to illustrate how anterior segment OCT can be used to understand corneal structure and function in health and disease...
  53. ncbi A review of the Holden-Mertz criteria for critical oxygen transmission
    Desmond Fonn
    Eye Contact Lens 31:247-51. 2005
    ..Experience with extended and daily wear of disposable contact lenses during the last 2 decades and, more recently, with silicone hydrogels has led to the reconsideration of the validity of the findings of Holden and Mertz...
  54. ncbi A comparison of three different scales for rating contact lens handling
    Renee du Toit
    Cornea and Contact Lens Research Unit, University of New South Wales, Sydney, Australia
    Optom Vis Sci 79:313-20. 2002
    ..To compare the validity, responsiveness, and reliability of three subjective rating scales applied to soft contact lens (SCL) handling...