This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
Diabetic retinopathy, most likely present with 
Select and explain. 
A. IDDM with 2 years duration, B. NIDDM with 2 years duration, C. Juvenile diabetes, D. Gestational diabetes
B: NIDDM with 2 years duration
Answer: B: NIDDM with 2 years duration 
Explanation: B i.e. NIDDM with 2 years duration Diabetic Retinopathy (DR) is commoner in type 1 or IDDM (40%) than in type 2 (NIDDM) diabetes mellitus (20%) Duration of diabetes is most impoant risk factor Q for DR. DR rarely develops within 5 years of the onset of diabetes or before pubey, but about 5% of type 2 (NIDDM) diabetics have DR at presentation.