The effects of habitual wear on light transmissibility of hydrogel contact lenses

Abstract

The purpose of this paper was to determine if hydrogel lenses ability to transmit the visible spectrum of light is altered during a normal wearing course . Seven subjects (14 eyes) were fit with Coopervision permaflex (74% water) contact lenses. The subjects were instructed to wear the lenses on a daily basis for three months. The transmission spectrum of the subjects lenses was then compared (after 3 months) to that of a control lens of the same power and base curve for eleven wavelengths ranging from 200-800nm. The authors found a significant change at the .05 level (T-test) for all eleven wavelengths considered.