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Abstract
Purpose. A retrospective study was developed to evaluate risk factors in adult-onset myopia. Methods. Subjects included were 25 to 35 years old. There were 116 non-myopic subjects in the control group and 66 myopic subjects with first lens prescription at age 17 or later. Subjects received a questionnaire about academic achievement, daily hours of reading during years of study, and family history of myopia. Results. The level of academic achievement was similar for myopic and non-myopic groups in this sample. Myopia was associated with family history (? 2 = 6.131, p = 0.013) and with daily hours of reading during years of study (? 2 = 3.904, p = 0.048). According to multiple logistic regression analysis, the correlation of myopia with family history adjusted for daily hours of reading remained significant (p = 0.005), whereas the correlation with daily hours of reading adjusted for family history was not significant (p = 0.061). Conclusions. After multivariate analysis, adult-onset myopia was significantly associated only with family history of myopia.