Chronic hyperglycaemia impairs retinal microvasculature and rod cell function, causing poor night adaptation, explains Senior Ophthalmologist Dr Satyanarayana Kada. Diabetologist Dr Aashirwad Pawar, Sai Aashirwad Hospital, notes diabetic macular edema and retinopathy as key contributors. Early glycaemic control and retinal screening remain crucial for preserving scotopic vision in diabetics.