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Contact lens-induced subconjunctival hemorrhage.

PURPOSE: To present the first detailed assessment of the clinical features of CL-induced subconjunctival hemorrhage and associated risk factors.

DESIGN: Cross-sectional and case-control study of age-matched randomized groups.

METHODS: A total of 45 CL wearers with subconjunctival hemorrhage aged 18 to 45 years (CL-Hemorrhage group), 200 age-matched healthy control subjects (non-CL group), and 200 age-matched CL wearers (CL group) were enrolled. The conjunctiva was divided into the following 8 equal areas: superior, superior/nasal, nasal, inferior/nasal, inferior, inferior/temporal, temporal, and superior/temporal. The site of hemorrhage, the grade, and other parameters of conjunctivochalasis at 3 locations (nasal, middle, and temporal), and the grade of pinguecula on the nasal or temporal conjunctiva were determined in all subjects.

RESULTS: Typically, subconjunctival hemorrhage affected 1 or 2 regions of the temporal conjunctiva. The grade of conjunctivochalasis and pinguecula was higher in both the affected and unaffected eyes of the CL-Hemorrhage group than the non-CL and CL groups (all P < .00001). The effect of downward gaze or digital pressure on the extent of conjunctivochalasis was more marked in the CL-Hemorrhage group and superficial punctate keratitis was more common (all P < .00001). Multivariate logistic regression analysis of variables revealed that the presence of conjunctivochalasis and pinguecula were associated with an increased risk of CL-induced subconjunctival hemorrhage (all P < .05).

CONCLUSIONS: These results suggest that the major risk factors for CL-induced subconjunctival hemorrhage are conjunctivochalasis and pinguecula.

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