Odds ratios for prevalent or incident myopia. SMS - Sydney Myopia Study;
SAVES e Sydney Adolescent and Vascular Eye Study. Odds ratios are relative to the
reference group in each study of high outdoors/low near-work. The decline in odds
ratio from the high near-work/low outdoors condition to the high near-work/high
outdoors conditions illustrates the protective effect of increasing time outdoors
against the highest tertile of near-work. Complete protection would be achieved if the
odds ratio had been reduced to one.