India is considered the diabetes capital of the world and many diabetics have cataract also needing surgery. Complication of cataract surgery may be more if the person is diabetic. Considering this we aimed to study the problems and visual outcome associated with cataract surgery in diabetic patients. Material and methods: This was a hospital based prospective study carried in the department of ophthalmology of institute of Azamgarh during the period between August 2022 to March 2023. A total of 190 patients were enrolled after applying exclusion criteria. A detailed history regarding socio-demographic profile was taken and after cataract extraction patients were followed for 3 months to see if any complication is there. Visual acuity is tested at 6 weeks. Results: Complications was observed in more than 3/5th of the diabetic patients. Most common immediate post-operative complication was corneal edema present in more than 1/4th patients affecting females significantly more as compared to males and this association was found to be statistically significant. Second most common complication was iritis. Cystoid macular edema was the commonest late complication followed by recurrent uveitis. Conclusion: Older age is a predisposing factor for diabetes as well as cataract. Diabetes may be the reason for more complication in the patients. Management of blood sugar level is a must before and even after the cataract extraction surgery.