Comparative Evaluation of Visual Outcome of Cataract Surgery in Patients with Type-II Diabetes Mellitus with Those without Diabetes in a Rural Medical College Hospital

It is also noted that cataract develops at an earlier age in diabetics. In addition to cataract vision is affected in diabetics by other mechanisms too. Diabetes causes microangiopathy which manifests as diabetic retinopathy, nephropathy and neuropathy. Newer studies have shown that retinal neurodegeneration also occurs along with or may precede retinal vasculopathy. Retinal neurodegeneration caused by diabetes clinically manifests as reduction in retinal nerve fibre layer, ganglion cell layer and also Muller cells. It also affects colour vision and other aspects like spatial frequency and changes on electrophysiology. Diabetes not only affects the retina but also cornea, tear film and lens which lead to changes in the optical quality of the diabetic eye.