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Retinitis pigmentosa (attenuated ERG)

The electroretinogram (ERG) is exquisitely sensitive to the earliest retinal changes in most of the retinitis pigmentosas. It is frequently the case that the ERG will be severely attenuated or totally absent before other signs or symptoms appear. (Contributed by Dr. Rosa Ana Tang.)

Associated Disorders

  • Bassen-Kornzweig disease
  • Cushing syndrome
  • Kearns-Sayre syndrome
  • Lawrence-Moon-Biedl syndrome
  • Mitochondrial encephalopathy with lactic acidosis and stroke-like episodes (MELAS)
  • Ocular paraneoplastic syndromes
  • Refsum disease
  • Usher syndrome
  • gastroesophageal reflux disease
  • posterior vitreous detachment
  • retinal detachment
  • systemic arterial hypertension
  • systemic lupus erythematosus