Objective:To know the prevalence of diabetes in cataract patients. Methodology:A prospective observational study conducted in ophthalmology department. The total number of patients including males and females having cataract were included. The duration of the study was 6 months including all age groups. Torch light and slit lamp examinations were done. For all those patients who were not previously diagnosed as having diabetes, fasting blood glucose estimation was evaluated twice: once in the field using capillary blood and a second time at the base hospital using venous blood (glucose oxidase method). Patients were considered to be newly diagnosed subjects with diabetes if fasting bloodglucose level was 110 mg/dl or more on 2 occasions, as described previously. The lens opacity is classified based on lens opacity classification system (LOCS III) comparing with the standard photographs system. Conclusion:In our study 44.5% patients had diabetes with cataract.