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PURPOSE: To evaluate central corneal thickness (CCT) in a Japanese population and to describe the relationship between CCT and other factors. DESIGN: Population-based cross-sectional study. METHODS: Reliable CCT measurements were obtained using specular-type pachymetry from 2,868 persons 40 years or older selected randomly from the population of Tajimi City. RESULTS: The CCT averaged 0.521 ± 0.032 mm (mean ± standard deviation). The CCT was thicker in men than in women (P < .001) and was correlated with age (right eyes only), height, weight, diastolic blood pressure, systolic blood pressure (left eyes only), intraocular pressure (IOP), and corneal curvature (P < .05, the Pearson correlation analyses). Multiple regression analysis showed that only gender, IOP, and corneal curvature were significantly (P < .011) associated with CCT. CONCLUSIONS: The mean CCT obtained using an optical method in a Japanese population was 0.521 mm. The CCT was associated significantly with gender, IOP, and corneal curvature but not with age in multiple regression analyses.
Dr. A. Tomidokoro, Department of Ophthalmology, University of Tokyo Graduate School of Medicine, Tokyo, Japan. Tomidokoro-tky@umin.ac.jp
2.2 Cornea (Part of: 2 Anatomical structures in glaucoma)
6.1.3 Factors affecting IOP (Part of: 6 Clinical examination methods > 6.1 Intraocular pressure measurement; factors affecting IOP)