Retinal vein occlusion is the second most common cause of visual loss due to retinal vascular disease after diabetic retinopathy.1 Among the risk factors described, it is well known that the hypercoagulable state present in neoplasias can culminate in vein occlusion. It is described that any ocular structure may be involved in acute leukemia2; involvement of the choroid and retina is the most c...

PURPOSE To determine plasma homocysteine and cysteine levels in patients with retinal vein occlusion (RVO) and in healthy subjects and to ascertain whether there are statistically significant differences between patients and control subjects. METHODS In this case-control study, the study group consisted of 75 consecutive patients with RVO: 33 had central retinal vein occlusion (CRVO), and 42 ...

PURPOSE To describe the time course of microvascular changes after transient branch retinal vein occlusion (BRVO) in rats. METHODS BRVO was induced in pigmented rats by focal laser photocoagulation. The subsequent changes in the retinal angiogram were followed up, both in vivo by confocal scanning laser ophthalmoscopy and ex vivo by confocal microscopy. RESULTS At day 1, capillary closure a...