PMID: 6963518Jul 1, 1982Paper

Hemi-central retinal vein occlusion. Pathogenesis, clinical features, natural history and incidence of dual trunk central retinal vein

Transactions of the Ophthalmological Societies of the United Kingdom
A Chopdar

Abstract

It has been shown that dual trunk central retinal vein (CRV) occurs in 20.3 per cent of a normal population. Confirmatory evidence has been produced by the results of anatomical, histological and micro-dissection studies. Occlusion of the single trunk of such a vein in its retrolaminar, or intraneural part, would result in a venous occlusion affecting one-half of the retina similar to that of branch retinal vein occlusion (BRVO). Yet this should be regarded as a variation of CRVO. Visual prognosis seems to be better in hemi-central retinal venous occlusion than in total CRVO. The site of development of collateral gives a clue to the site of the occlusion. Therefore, it is suggested that hemi-CRVO is a distinct entity and should not be confused with so-called hemi-spherical vein occlusion which is a variation of BRVO.

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