Argon Laser Photocoagulation for Macular Edema in Branch Vein Occlusion

The Branch Vein Occlusion Study (BVOS) was a randomized, incompletely masked, controlled clinical trial in patients with a branch retinal vein occlusion (BRVO) occurring 3 to 18 months earlier, with best corrected visual acuity of 20/40 or worse from macular edema. The study showed that argon laser grid photocoagulation could improve visual acuity in eyes with BRVO and macular edema reducing visual acuity to 20/40 or worse. After this study, grid photocoagulation of the macula became the standard of care for BRVO with macular edema with foveal involvement and capillary leakage with visual acuity of 20/40 or worse, and it remains the gold standard therapy for perfused macular edema in BRVO. Advantages are that it is proven, widely available, nonsurgical, and of relatively moderate cost.

An unusual trigger cause of branch vein occlusion and vitreous hemorrhage from prepapillary arterial loop: A case report

Background To describe a rare case of vein occlusion and vitreous hemorrhage as complications of prepapillary arterial loop. In this report, sinusitis was recognized as an uncommon cause of bleeding from this optic disc abnormality. Case presentations: A case of a-33-old-man suffering from acute sinusitis and presented with vitreous hemorrhage. Etiologic investigations were normal. Fundus examination and angiography confirmed the diagnosis of prepapillary arterial loop and a mild peripheral vein occlusion. Good prognosis was noted after the treatment of sinusitis and water drink. Conclusions Sinusitis should be considered as a possible trigger factor of bleeding from prepapillary loops in any healthy young patient. An early treatment of the sinus inflammation may lead to a good prognosis.