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Muriel Schornack, Cherie B Nau, Amy Catherine Nau, Jennifer S Harthan, Jennifer Swingle Fogt, Ellen Shorter; Patient-Reported Mid-Day Fogging with Scleral Lens Wear. Invest. Ophthalmol. Vis. Sci. 2019;60(9):6375.
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© ARVO (1962-2015); The Authors (2016-present)
A common phenomenon unique to scleral lens wear is mid-day fogging. Accumulation of debris in the post-lens fluid reservoir or surface non- wetting may necessitate periodic removal of scleral lenses during the day. The SCOPE (Scleral Lenses in Current Ophthalmic Practice Evaluation) study team conducted a multi-center study to assess prevalence of mid-day fogging and associated factors.
An online survey of eye care providers was conducted from December 13, 2016 to March 31, 2017. Scleral Lens Education Society members were invited to participate via e-mail. Links to the survey were also posted on the Scleral Lens Practitioners Facebook page and included in two online newsletters (I-Site and BCLA newsletter). Prescribers were asked to provide information about their most recently evaluated established scleral lens patient (history of ≥ 6 months of lens wear). We report the prevalence of mid-day fogging, and assess the frequency of this phenomenon in patients wearing various lens designs. Statistical analysis was completed using 2 sample t-test and Pearson chi-square test.
We received 292 responses representing 26 countries. Mean patient age was 44 ± 14 years (mean ± SD; n=285) (range 18-86 years); gender distribution was 184 male/108 female. 248 participants responded to a survey item which asked if patient reported issues with mid-day fogging (mean age 45±15, n=243, range 18-85; 158 male/90 female). Mid-day fogging was reported by 25% (n=64) of patients. Overall lens diameter was reported for 253 patients (61 foggers, 174 non-foggers). Mean lens diameter in foggers was16.5±1.1 mm; mean lens diameter in non-foggers was 16.2±1.4 mm. This difference was not significant (2 sample t-test, p=0.15). Haptic design (spherical vs. non-spherical) was reported for 220 patients (55 foggers, 165 non-foggers). The proportion of wearers with mid-day fogging when comparing lens wearers with spherical haptics (32/141) to those wearing non-spherical haptics (55/220) was not statistically significant (chi-square, p=0.292).
Approximately 1 in 4 scleral lens wearers in this population reported issues with mid-day fogging. Neither lens diameter nor haptic design was associated with the prevalence of patient-reported mid-day fogging.
This abstract was presented at the 2019 ARVO Annual Meeting, held in Vancouver, Canada, April 28 - May 2, 2019.
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