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  • Title: Risk Factors for Contact Lens-Related Microbial Keratitis and Associated Vision Loss in a South Indian Population.
    Author: Konda N, Garg P, Sharma S, Willcox MDP.
    Journal: Eye Contact Lens; 2021 Feb 01; 47(2):118-126. PubMed ID: 33009258.
    Abstract:
    OBJECTIVES: To identify risk factors associated with contact lens-related microbial keratitis (CL-MK) and subsequent vision loss in a south Indian population. METHODS: A retrospective study of medical records at the LV Prasad Eye Institute in Hyderabad, India, of patients diagnosed with CL-MK and of controls who had no history of corneal inflammation during contact lens wear was undertaken. Variables such as demographic data, contact lens wear details, duration of the event, visual acuity, epithelial defect and infiltrate size, and microbiology of the cornea during the event were collected. Differences between cases and controls were analyzed using parametric and nonparametric tests. Logistic regression was used to calculate the odds ratio (OR) and associated 95% confidence intervals in univariate and multivariate analyses for cases vs. controls and for factors associated with vision loss. RESULTS: One hundred sixty-seven cases of CL-MK and 153 controls were included in the analyses. Risk factors associated with the greatest increased OR for CL-related MK were: being in professional employment vs. a student (OR=3.9), disposing lenses yearly versus monthly or biweekly (OR=2.2), and any overnight wear (OR=2.8). Risk factors associated with vision loss were: high myopia (OR=3.6), severe vs. mild severity (OR=16.0), and hypopyon (OR=4.3). CONCLUSIONS: Identification of these risk factors may help inform safe contact lens wear habits and management strategies.
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