The existence of a relationship between pupil size and refractive error among school-aged children was investigated in the present study. Pupil size was recorded photographically, and refractive error was determined by retinoscopy. In general, the subjects represented two age groups: ages 6-7 and ages 14- 15. The results found that both age groups showed negative correlations between pupil size and refractive error; however, not all correlations were statistically significant. More correlations were statistically significant in the female age 6-7 group than in the male age 6-7 group, while more correlations were statistically significant in the male age 14-15 group than in the female age 14-15 group. When all subjects, male and female ages 6-15, were analyzed, a significant (p
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