Abstract
PURPOSE: To estimate the incidence and predictive factors for cataract in eyes with episcleritis and scleritis, and to evaluate the outcome of cataract surgery in those eyes. DESIGN: Retrospective cohort study at uveitis subspecialty centers. METHODS: One thousand three hundred eighty-four eyes with non-infectious scleritis and episcleritis at risk of cataract were included. Predictive factors for cataract development were assessed by multivariable Cox regression. The main outcomes were development of cataract, defined as the first reduction of presenting visual acuity <20/40 attributed to cataract or else occurrence of cataract surgery itself. A second cohort of eyes with episcleritis and scleritis that underwent cataract surgery was evaluated for postoperative outcomes. Logistic regression was utilized to assess variables associated with visual acuity 20/40 or better one year after cataract surgery. RESULTS: Seventy-six eyes developed cataract (incidence = 0.025/eye-year, 95% confidence interval: 0.019-0.031). Age ≥65 years, elevated intraocular pressure ≥30 mmHg, use of oral corticosteroids at the preceding visit, and anterior chamber inflammatory activity were associated with increased cataract incidence. Race/ethnicity, type of scleritis, and bilaterality were unassociated with cataract risk after adjustment. Among 79 cataractous eyes that underwent cataract surgery, median presenting visual acuity improved by 6 ETDRS lines. Pre-operative factors including duration of inflammation, immunotherapy use, and corticosteroid use were not significantly associated with odds of post-operative visual acuity 20/40 or better. CONCLUSIONS: Under subspecialty management, the incidence of cataract was low in eyes with episcleritis and scleritis. Cataract surgery was associated with large and sustained improvements in visual acuity.