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Background To determine the prevalence of crowded optic discs and their associations with ocular and general parameters. Methods The Beijing Eye Study included 4,439 subjects out of 5,324 subjects invited to participate (response rate 83.4%) with an age of 40+ years. The present investigation consisted of 8,594 eyes (96.8%) of 4,324 subjects (97.4%) for whom readable fundus photographs of at least...
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