NORMAL AND AMBLYOPIC CONTRAST SENSITIVITY FUNCTIONS IN CENTRAL AND PERIPHERAL RETINAS

  • 1 January 1978
    • journal article
    • research article
    • Vol. 17  (8) , 746-753
Abstract
Contrast sensitivity functions (CSF) for temporally modulated sine wave gratings were established at a variety of retinal eccentricities in 3 esotropic amblyopes with acuities in their amblyopic eyes of 20/50, 20/100 and 20/300. CSF varied with eccentricity and the degree of amblyopia. In the 20/50 amblyope, reduced CSF were confined to the higher spatial frequencies and to the central 5.degree. of the retina. Given greater acuity deficits (e.g., 20/100 and 20/300), CSF were depressed over the entire spatial frequency range tested, with the effects intruding farther into the peripheral retina than for the 20/50 amblyope. The detection of temporal and spatial modulation was depressed in the CSF of the observers with severe amblyopia.