Normal S cone electroretinogram b-wave in Oguchi's disease

Br J Ophthalmol. 1997 Dec;81(12):1043-5. doi: 10.1136/bjo.81.12.1043.

Abstract

Aim: The short wavelength sensitive (S) cone electroretinograms (ERGs) were examined in two patients with Oguchi's disease to study S cone function.

Methods: Ganzfeld colour flashes under bright white background illumination were used to elicit S cone, and mixed long (L) and middle (M) wavelength sensitive cone ERGs.

Results: The S cone ERG b-wave was normal with short wavelength stimuli with normal L and M cone responses in both patients.

Conclusions: These ERG results indicate that the S cone system as well as the L and M cone system is not defective in Oguchi's disease, while the S cone responses are not detectable in the complete type of congenital stationary night blindness as reported previously. The results imply that there is a significant difference in the way the S cone system is affected in different forms of stationary night blindness, and that the S cone and rod do not share the same arrestin system.

Publication types

  • Case Reports

MeSH terms

  • Adult
  • Electroretinography
  • Female
  • Humans
  • Middle Aged
  • Night Blindness / physiopathology*
  • Photic Stimulation
  • Retinal Cone Photoreceptor Cells / physiopathology*
  • Retinal Rod Photoreceptor Cells / physiopathology