Impairments of L-Cone/M-Cone and S-Cone–mediated Color Discrimination in Macular Telangiectasia Type Ii

Abstract

Macular telangiectasia is associated with widened Rayleigh and Moreland matches, suggesting dysfunction of both the M-cone versus L-cone (red–green) and S-cone versus M/L-cone (tritan) subsystems of color vision. In a minority of patients, red-shifted Rayleigh matches point to decreased cone photopigment optical density.