Purchase this article with an account.
Jennifer Swingle Fogt, Jennifer Harthan, Amy Catherine Nau, Ellen Shorter, Muriel Schornack, Cherie B Nau; Effect of Short-term Scleral Lens Wear of Small and Large Diameter on Intraocular Pressure. Invest. Ophthalmol. Vis. Sci. 2020;61(7):1480.
Download citation file:
© ARVO (1962-2015); The Authors (2016-present)
Current reports of the impact of scleral lens wear on intraocular pressure (IOP) are inconsistent. The purpose of this study was to determine if the diameter of a scleral lens might influence IOP. In this study, IOP was measured before, during, and immediately after scleral lens wear with a large and small diameter scleral lenses
Twenty normal subjects participated in this study (n=5 males and n=15 females) with a mean age of 29 ± 9 (SD) years (Range: 22-57 years). Subjects were fit with both 15.2 mm and 18.0mm diameter scleral lenses according to the manufacturer’s guidelines on the right eye only. The initial lens worn was randomized. IOP measurements were made with a pneumatonometer (Model 30 Classic, Reichert, Inc., Buffalo, NY) on the temporal sclera whether or not a scleral lens was present. Three measurements were recorded and averaged at each time point: before lens placement, immediately after lens placement, after one hour of lens wear, and immediately after lens removal. Subjects then crossed-over to the remaining study lens and repeated the testing sequence. A repeated measures two-factor analysis of variance was completed. Paired t-tests with Bonferroni correction (P<0.02) were used to compare changes in IOP.
Mean IOP measured with peripheral pneumotonometry at baseline was 27.0±5.4 mm Hg. The change in IOP from baseline after initial lens insertion, at 1 hour of lens wear, and after lens removal, with the 15.2mm lens were -0.4±3.5(P=0.6); 1.7±3.6(P=0.05); -2.0±4.5(P=0.06) respectively. With the 18.0mm diameter lens, the changes in IOP were:-0.6±5.7(P=0.7); 0.5±6.9(P=0.8) and 0.8±4.0(P=0.4) respectively. When evaluating the effect of lens diameter and the time point at which each measurement occurred, there was no significant difference in the change in IOP. The interaction term between lens diameter and time point also showed no significant difference in IOP.
In this study, scleral lens wear did not change IOP regardless of the lens diameter or the time points at which IOP was assessed, which included immediately after lens insertion, with 1 hour of lens wear, and after lens removal at 1 hour.
This is a 2020 ARVO Annual Meeting abstract.
This PDF is available to Subscribers Only