Progressive damage to blood vessels supplying the retinal tissue is the cause of DR. The classification of retinopathy ... and blot' hemorrhages, hard (intraretinal) exudates, macular edema ...
We propose that an area on chromosome 1 may harbor a gene or genes conferring susceptibility to diabetic retinopathy. 21 Definite hard exudates, soft exudates, or intraretinal microvascular ...