<prompt> A 35-year-old insulin dependent Diabetes Mellitus iddm patient on insulin for the past 10 years. He complains of gradually progressive painless loss of vision. Most likely he has:CataractVitreous haemorrhageTotal rhegmatogenous retinal detachmentTractional retinal detachment not involving the macula  <response>: Cataract - pre senile cataract, so is likely possibility here and is answer of choice. Vitreous hamorrhage would be sudden and more so in proliferative diabetic retinopathyso excluded. Total rhegmatogenous retinal detachment would be sudden so excluded. Tractional retinal detachment not involving the macula - at periphery this wont cause loss of vision so should not be the answer here. 