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Dark adaptation in patients with Best vitelliform macular dystrophy.
  1. W Baca,
  2. G A Fishman,
  3. K R Alexander and
  4. A M Glenn
  1. Department of Ophthalmology and Visual Sciences, University of Illinois, Chicago College of Medicine 60612.

    Abstract

    Psychophysical dark adaptation studies were performed in six patients with Best vitelliform macular dystrophy (BVMD) using a Goldmann-Weekers dark adaptometer. Prebleach thresholds were determined before obtaining a postbleach full recovery curve. Unlike patients with Stargardt macular dystrophy, all patients with BVMD showed a normal time to reach their baseline dark adapted thresholds after bleaching of their rod visual pigment when tested in clinically normal appearing retina. Although a lipofuscin material accumulates within retinal pigment epithelial cells in patients with either Best or Stargardt dystrophy, functional findings pertaining to recovery of rod dark adaptation thresholds as well as electro-oculogram light peak to dark trough ratios are different in these two disorders.

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