Branch Retinal Vein Occlusion

Published on 10/05/2015 by admin

Filed under Opthalmology

Last modified 10/05/2015

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Branch Retinal Vein Occlusion

Introduction:

Branch retinal vein occlusion (BRVO) is characterized by retinal hemorrhages in the territory of the obstructed vein. Macular edema, retinal ischemia and neovascularization can result, producing visual reduction.

Epidemiology:

BRVO usually occurs in patients in their fifth or sixth decades of life. The prevalence of BRVO in developed countries is estimated at just below 1%. There does not appear to be any racial or ethnic predilection. Systemic arterial hypertension is the most common systemic risk factor, present in about 75% of affected patients. The pathogenesis is believed to be disease of the adjacent arterial wall leading to venous compressesion at an arterovenous crossing point.

Clinical Features:

Patients may complain of visual blurring, distortion or metamorphopsia. On examination, intraretinal flame and blot shaped hemorrhages as seen in the territory of a dilated, tortuous retinal vein are present (Fig. 14.1.1

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