(A) Baseline retinal blood flow in nondiabetic volunteers and patients with type 1 diabetes mellitus with and without peripheral sensory polyneuropathy. (B) Flicker light stimulated retinal blood flow in nondiabetic volunteers and patients with type 1 diabetes mellitus with and without peripheral sensory polyneuropathy. Values are mean ± SD. AU, arbitrary units; C, nondiabetic control subjects; DNP-, diabetic patients without polyneuropathy; DPN+, diabetic patients with polyneuropathy; RBF, retinal blood flow. *P < .05 vs nondiabetic volunteers. $
P < .05 vs diabetic patients without polyneuropathy.