Inclusion Criteria:  patients with type 2 diabetes with PDR treatment-naive PDR diabetic patients diagnosed clinically and by the presence of neovascularization on optic disc (NVDs) or elsewhere (NVEs) on fluorescein angiography.  Exclusion Criteria:  Patients with significant media opacity decreasing image quality  -. Eyes with significant macular edema  patients with glaucoma, uveitis, previous intraocular surgery, and history of previous treatment for diabetic retinopathy including anti-VEGF and laser patients with low signal strength index (SSI; <50) presence of 1 or more blink artifacts poor fixation leading to motion artifacts.