Introduction: Retinal capillary nonperfusion (CNP) is one of the retinal vascular diseases in diabetic retinopathy (DR) patients. As there is no comprehensive detection technique to recognize CNP areas. we proposed a different method for computing detection of ischemic retina. non-perfused (NP) regions. https://allfixelectricales.shop/product-category/fridge-water-hose-tap-connector/