Prevalence and associated factors of corneal arcus in the geriatric population; Tehran geriatric eye study.

ABSTRACT

PURPOSE: To determine the age and sex-standardized prevalence of corneal arcus and its associated factors in a geriatric population. METHODS: This population-based cross-sectional study was conducted in 2019 in Tehran; the capital of Iran, using a multi-stage stratified random cluster sampling method. All participants underwent a detailed interview, blood pressure measurement, laboratory blood tests, and a complete ocular examination. RESULTS: Three thousand three hundred ten of 3791 invitees participated in the study (response rate 87.31%). The mean age of the participants was 69.35 ± 7.62 years (60-97 years) and 1912 (57.76%) were female. Overall, the age and sex-standardized prevalence (95% CI) of corneal arcus was 44.28% (41.21-47.39). Based on the multiple logistic regression, the odds of corneal arcus were higher in men than in women (OR 1.51; 95% CI 1.14-2.00); in the age group ≥ 80 years compared to the age group 60-64 years (OR 2.44; 95% CI 1.68-3.53), and in retired people compared to employed individuals (OR 2.05; 95% CI 1.31-3.21). CONCLUSION: The present study showed a high prevalence of corneal arcus in the geriatric population. Although various studies have reported a significant relationship between corneal arcus with blood lipid and glucose levels as well as blood pressure, these relationships were not found in the present study.