Luminance Thresholds Of The Water-Immersed Eye,

Abstract

Luminance thresholds were measured for the water-immersed eye as a function of adaptation level, viewing distance, and turbidity of the water, and compared to standard adaptation curves. In water, thresholds varied as a function of initial adaptation level, and the rate of adaptation paralleled that for the eye in air. However, thresholds were about 1 - 2 log units higher for the water-immersed eye than for the eye in air at all adaptation levels. (Author)