Retinal thickening can develop at all stages of retinopathy (Donald et al., 2003). It is the result of long duration of diabetes mellitus. Diabetic retinopathy (DR) at he time of the diagnosis of diabetes is lower with type I (0.4%) than type II (7.6%)
(Roy et al., 2004). Several factors influence DR viz., long duration of the disease, age, level of hyperglycemia control, hyperlipidemia, hyperviscosity, renal failure etc
,