June 2022
Volume 63, Issue 7
Open Access
ARVO Annual Meeting Abstract  |   June 2022
High Contrast Visual Acuity and Fogging in Established Scleral Lens Wearers
Author Affiliations & Notes
  • Jennifer Harthan
    Illinois College of Optometry, Chicago, Illinois, United States
  • Cherie B Nau
    Mayo Clinic Research Rochester, Rochester, Minnesota, United States
  • Muriel Schornack
    Mayo Clinic Research Rochester, Rochester, Minnesota, United States
  • Ellen Shorter
    Illinois Eye and Ear Infirmary, Chicago, Illinois, United States
  • Amy Catherine Nau
    Korb and Associates, Boston, Massachusetts, United States
  • Kimberly Patton
    The Ohio State University, Columbus, Ohio, United States
  • Jennifer Fogt
    The Ohio State University, Columbus, Ohio, United States
  • Footnotes
    Commercial Relationships   Jennifer Harthan Allergan, Essilor, Euclid Systems, International Keratoconus Academy, Metro Optics, SynergEyes, Visioneering Technologies, Inc., Code C (Consultant/Contractor), Bausch and Lomb, Kala Pharmaceuticals, Ocular Therapeutix, Metro Optics, Code F (Financial Support); Cherie Nau None; Muriel Schornack None; Ellen Shorter Johnson & Johnson, BostonSight, Contamac, Art Optical, SynergEyes, Code F (Financial Support); Amy Nau None; Kimberly Patton None; Jennifer Fogt Alcon, Contamac, Code C (Consultant/Contractor), Nevakar, EyeNovia, Alcon, Innovega, Contamac, Code F (Financial Support)
  • Footnotes
    Support  National Center for Advancing Translational Sciences of the National Institutes of Health under grant: UL1TR002733. National Eye Institute Center Core Grant P30 EY001792hT. Research to Prevent Blindness.
Investigative Ophthalmology & Visual Science June 2022, Vol.63, 554 – A0252. doi:
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      Jennifer Harthan, Cherie B Nau, Muriel Schornack, Ellen Shorter, Amy Catherine Nau, Kimberly Patton, Jennifer Fogt; High Contrast Visual Acuity and Fogging in Established Scleral Lens Wearers. Invest. Ophthalmol. Vis. Sci. 2022;63(7):554 – A0252.

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      © ARVO (1962-2015); The Authors (2016-present)

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Purpose : Patients may be fit with scleral lenses (SLs) for indications such as ocular surface disease or irregular corneal astigmatism. Patients wearing SLs often report improved vision and comfort, but some experience mid-day fogging, which may require removal and reapplication of their SLs due to blurry or hazy vision.

The purpose of the present study was to document high contrast visual acuity pre- and post-scleral lens removal in patients with (foggers) and without (non-foggers) subjective mid-day fogging.

Methods : Scleral lens wearers who had worn SLs for a minimum of six months were recruited from five clinical sites. Subjects who wore SLs for at least 2 hours prior to follow-up examinations were asked to participate. Informed consent was obtained, and the following information was collected: patient demographics, subjective complaint of mid-day fogging, and high contrast Freiburg Visual Acuity and Contrast Test (FrACT) pre- and post- scleral lens removal. Descriptive statistics are reported, and comparisons were made by t-test.

Results : Thirty established scleral lens wearers (53 eyes) participated in this study with a mean age of 46 ± 14.6 years (range 24-76 years). Subjects reported a mean SL wear time of 12.5 + 3.2 hours per day (range: 5-17 hours) and 6.5 + 0.8 days per week (range: 4-7 days). 57% (17/30) of subjects reported mid-day fogging.

Mean FrACT acuity in foggers was 0.23 + 0.3 logMAR (range: -0.09-0.94 logMAR, n=13) for right eyes and 0.08 + 0.2 (range: -0.23-0.32 logMAR, n=12) for left eyes. There was no statistically significant difference in FrACT acuity pre- or post-scleral lens removal in foggers for the right (p=0.5) or left (p=0.3) eyes. There was a barely significant difference in FrACT acuity between foggers and non-foggers in the right eye (p=0.05) but not in the left (p=0.3) eye with over two hours of lens wear.

Conclusions : Over half of the subjects in this study reported mid-day fogging but there was no difference in high contrast visual acuity pre-and post-scleral lens wear and minimal to no difference between foggers and non-foggers. Further analysis may provide more insight into the correlation between the subjective complaint of mid-day fogging and clinician observed findings.

This abstract was presented at the 2022 ARVO Annual Meeting, held in Denver, CO, May 1-4, 2022, and virtually.


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