Flicker fusion, dark adaptation and age as predictors of night vision.

Dark adaptation and critical flicker fusion thresholds for 60 subjects ranging in age from 16 through 89 were obtained. A methodical analysis of the statistical interrelationship among dark adaptation thresholds and critical flicker fusion thresholds as function of surround, light/dark ratio, and age were systematically examined. The prediction of dark adaptation threshold at the 40th minute was significantly increased by certain critical flicker fusion data. /author/.