Peripheral Microvascular Abnormalities Detected by Wide-Field Fluorescein Angiography in Eyes with Branch Retinal Vein Occlusion

Abstract

Purpose: To evaluate the location of microvascular abnormalities using wide-field fluorescein angiography (WFFA) and investigate the impact on visual outcome in eyes with branch retinal vein occlusion (BRVO).

Methods: Forty eyes of 39 patients (24 males and 15 females with an average age of 71 years) were retrospectively reviewed. One patient had BRVO bilaterally. WFFA was performed in all patients to evaluate perfusion status and detect microvascular abnormalities. The WFFA images were divided into 3 zones: zone 1, posterior pole; zone 2, mid-periphery; zone 3, far periphery, in order to document the presence of microvascular abnormalities. Scatter retinal photocoagulation (PC) was performed for retinal neovascularization (NV) and/or widespread nonperfused areas (NPAs).

Results: The incidence of microvascular abnormalities in zone 3 was significantly (p < 0.0001) less than in zones 1 and 2. The presence of larger NPAs in zone 1, but not in zone 3, was associated with the incidence of NV and vitreous hemorrhage. The presence of peripheral lesions and the application of PC did not affect the visual outcome.

Conclusion: The presence of peripheral abnormalities or scatter PC for NPAs did not affect the visual outcome in eyes with BRVO.

Keywords: Branch retinal vein occlusion; Microaneurysm; Neovascularization; Wide-field fluorescein angiography.