Photocoagulation therapy of leaking archer's type 2 retinal arteriovenous communication.

ABSTRACT

PURPOSE: Type 2 retinal arteriovenous communication is characterized by direct arteriovenous communication without an intervening arteriolar or capillary segment. It may be complicated by extravascular exudation. The successful results of low-intensity argon laser photocoagulation in two cases are reported. METHODS: Case report of two patients. RESULTS: Both cases were associated with a serous macular detachment, showing evidence of vascular leakage. Argon laser photocoagulation was performed. Visual improvement was observed in both cases, with disappearance of vascular leakage. CONCLUSION: Type 2 arteriovenous communications lead to increased arterial flow through a low-resistance vein. The resulting high intraluminal pressure may explain the observed vascular ectasia and consequent fluid leakage. Spontaneous regression may occur. Nevertheless, direct argon laser photocoagulation may be considered a therapeutic option and lead to visual improvement.