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Branch retinal vein occlusion(2)

Retinal vein occlusions are a common type of retinal vasculopathy, second only to diabetic retinopathy. There is no racial or sexual predilection. Patients are usually affected the fifth or sixth decade of life. Systemic hypertension is a risk factor because of the thickening of the arteriole and the ensuing venula compression, which occurs because the arterioles and venules are bound together by a common adventitial sheath. (Contributed by Dr. Rosa Tang.)

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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