For diabetic patients, controlling blood sugar and blood pressure at normal levels are of utmost importance. We know that cataracts in diabetic patients do develop faster, and in order to better treat diabetic retinopathy doctors will also require surgery for cataracts, but the timing of treatment is key. Clinically, we find that some patients’ original diabetic retinopathy will progress or even occur iris redness and neovascular glaucoma after cataract surgery, so we ask patients to try to If the cataract is too heavy and the fundus also has blood accumulation in the vitreous or retinal detachment, combined surgical treatment of cataract and fundus should be performed; if the condition of fundus is still stable and the vision is good after cataract surgery, we should not take it lightly, and we should ask a fundus specialist to check the fundus in the early postoperative period, such as 2~4 weeks, and deal with it according to the situation.