<prompt> The screening strategy for prevention of blindness from diabetic retinopathy according to the NPCB involves -Opportunistic screeningHigh risk screeningMass screeningScreening by Primary Care Physician  <response>: High risk screening is applied to the group which has increased risk of developing certain diseasecancer.Diabetic retinopathy patients are at increased risk of developing blindness. Therefore, screening strategy for prevention of blindness from diabetic retinopathy is high risk screening. 