Abstract
Dark-adapted two-color static perimetry is useful for evaluating and subtyping patients with retinitis pigmentosa. Perimetric data were acquired from the entire visual field with a modified automated perimeter and then transmitted to a microcomputer for further analyses. Programs were developed to determine whether rods, cones, or both photoreceptor systems mediated function at all test loci; calculate sensitivity loss at these loci; and display any loss in gray scale, contour, and perspective form.