The present study proposes itself to display the behaviour of eyes proposed for operation of cataract in case of the existence of diabetes. Therefore on a lot of 868 operated eyes for cataract using the EEC +/- IOL method has been found that 28 eyes of having diabetes required antidiabetic treatment. From these, 9 didn't present diabetic retinopathy, 15 had diabetic background retinopathy and 4 presented proliferative diabetic retinopathy without rubeosis iridis or neovascular glaucoma. From these, 9 were operated through EEC and 19 through EEC +/- IOL. The intra- and postoperative complications were more frequent at the patients having diabetes. There weren't marked differences regarding the implant of the artificial crystalline. The operation of cataract brings to the appearance or to the increasing of the gravity of ocular phenomena of the diabetes. Thus, the diabetes retinopathy grows progressively worse after the surgical intervention, inflammatory phenomena of the anterior segment of the eye are more frequent, endophthalmitis appears more frequently due to the low immunity of the sufferings of diabetes. The method to be elected for solving the cataract of the sufferings with diabetes mellitus remains EEC +/- IOL.