Visual performance with soft hydrophilic contact lenses

An instability of the visual correction is sometimes associated with soft hydrophilic contact lenses. However, this problem does not seem to have detracted from the commercial success of this form of refractive aid. To facilitate the quantification of visual performance during soft lens wear, a televised test system was developed and has been fully described elsewhere. Results are now presented of a clinical study using this television (TV) system. Visual performance scores, in conjunction with response latency and blink activity data, were obtained from the eyes of 27 experimentally naïve subjects during the first month of adaptation to soft contact lens wear. The results suggest that the soft contact lens wearer has recourse to a strategy whereby he can optimize his level of visual performance when necessary.