Inclusion Criteria:  HbA1c 8-12% Diabetic patients with no retinopathy as screened with teleretinal imaging Diabetic patients with microaneurysms as detected with fundus teleretinal screening ERG oscillatory potential delays in response to dim flash stimuli  Exclusion Criteria:  Patients with pituitary tumor, psychosis, Parkinson's disease Patients with confounding ocular disease (visually significant cataract, glaucoma, macular degeneration, retinitis pigmentosa) Patients with cognitive deficits (score of 24 or less on the Montreal Cognitive Assessment-MOCA No anti-VEGF or steroid treatments within the last 12 months Pregnancy