Exposure to sunlight reduces the risk of myopia in rhesus monkeys.

However, because there were outliers in both groups, and because the sample sizes were small, the differences between the groups did not reach statistical significance by the end of treatment (NL group versus AL group: anisometropia: -0.82 ± 1.27D vs -1.28 ±1.45D, t = 0.483; P = 0.646).

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