Prevalence, risk factors, and impact of undiagnosed visually significant cataract: The Singapore epidemiology of eye diseases study

Abstract

Objective To determine the prevalence, risk factors, and impact of undiagnosed visually significant cataract in an Asian population. Methods The Singapore Epidemiology of Eye Diseases is a population-based study where 8,697 adults of Malay, Indian, and Chinese ethnicities aged > 40 years were invited for an eye examination, including lens photograph, to establish cataract diagnosis. Visually significant cataract was defined by Wisconsin Cataract Grading System and a best-corrected visual acuity <20/40 with cataract as the primary cause of vision impairment. Participants were deemed 'undiagnosed' if they had visually significant cataract and reported no prior physician diagnosis of cataract. ..