Correlation between contrast sensitivity and visual acuity in retinitis pigmentosa patients.

Purpose: High-contrast figures such as Landolt rings are insufficient to evaluate the function of the foveal cones of retinitis pigmentosa (RP) patients. We investigated the correlation between visual function as determined with Landolt rings and with the Vistech Contrast Sensitivity Function Test (VCTS) at various spatial frequencies, in addition to the Cambridge Low Contrast Grating (CLCG).

Methods: The study included 30 retinitis pigmentosa patients (53 eyes).