title: Retinal pigment epithelial dysfunction in patients with pigment dispersion syndrome: implications for the theory of pathogenesis.
abstract: OBJECTIVE
  To test the hypothesis that the retinal pigment epithelial/photoreceptor complex is affected in patients with pigment dispersion syndrome and/or in patients with pigmentary glaucoma.
  
  
  METHODS
  Electro-oculograms were recorded from patients with pigment dispersion syndrome, pigmentary glaucoma, ocular hypertension, and primary open-angle glaucoma and from control subjects. Electro-oculograms were recorded during 15 minutes of dark adaptation followed by 15 minutes of light adaptation. For each subject, dark-trough amplitudes, dark-trough latencies, light-peak amplitudes, light-peak latencies, and ratios of the light-peak amplitude to the dark-trough amplitude (Arden ratios) were calculated.
  
  
  RESULTS
  A 1-way analysis of variance of the Arden ratios indicated significant differences among the groups of subjects. Results of a post hoc Newman-Keuls test revealed that the mean Arden ratios of patients with pigment dispersion syndrome and patients with pigmentary glaucoma were significantly lower than the mean ratios of the controls, the patients with primary open-angle glaucoma, and those with ocular hypertension.
  
  
  CONCLUSIONS
  The results provide support for the hypothesis that the integrity of the retinal pigment epithelial/photoreceptor complex is affected in patients with pigment dispersion syndrome and in those with pigmentary glaucoma. Congenital and/or structural abnormalities of the retinal pigment epithelial/photoreceptor complex should be considered when models of the etiology of pigment dispersion syndrome are proposed.
authors.affiliation: Department of Ophthalmology, New York University School of Medicine, 550 First Ave, New York, NY 10016, USA. vcg1@nyu.edu
authors.forename: V C
authors.initials: VC
authors.lastname: Greenstein
authors.forename: W
authors.initials: W
authors.lastname: Seiple
authors.forename: J
authors.initials: J
authors.lastname: Liebmann
authors.forename: R
authors.initials: R
authors.lastname: Ritch
mesh_terms: D000328:Adult; D000368:Aged; D000704:Analysis of Variance; D003623:Dark Adaptation; D004585:Electrooculography; D017889:Exfoliation Syndrome / Q000150:complications* / Q000503:physiopathology; D005260:Female; D005902:Glaucoma, Open-Angle / Q000150:complications* / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009798:Ocular Hypertension / Q000150:complications / Q000503:physiopathology; D010857:Pigment Epithelium of Eye / Q000473:pathology* / Q000503:physiopathology; D012164:Retinal Diseases / Q000209:etiology* / Q000503:physiopathology