Plasma and vitreous homocysteine concentrations in patients with proliferative diabetic retinopathy.

Purpose:An increase in plasma concentrations of homocysteine (Hcy) in proliferative diabetic retinopathy (PDR) has been described. The aim of this study was to investigate vitreous Hcy levels in patients with PDR.Methods:Plasma and vitreous samples were obtained simultaneously at the time of vitreor