Contrast sensitivity in patients with posterior chamber intraocular lens implants.

Divergent contrast sensitivity findings have been reported in patients with intraocular lens implants. In this study, contrast sensitivity to stationary sine-wave gratings of six spatial frequencies from 0.5 to 22.8 cycles/degree was measured psychophysically in 13 patients with posterior chamber intraocular lens implants and in 10 controls. Corrected visual acuity was 0.7 to 1.0 in the intraocular lens group and 0.9 to 1.0 in the reference group. The age, the pupil diameter and the rate of subtle age-related macular changes were equal in the two groups. No statistically significant difference in mean contrast sensitivity between the patients and the controls was observed at any spatial frequency examined.