My father has vitrous hemmorage and has a diabatese also can it is curable by operations what are the risks?

Yes: 75% of hemorrhages from proliferative diabetic retinopathy will clear adequately enough to allow laser in order to shrink abnormal blood vessels. In cases slow to respond, intraocular injections may be indicated in order to speed up the process. With clearing vision returns in over 95% of cases. Those failing to clear over a 6 - 12 week window are candidates for surgical removal-95% success.

Risks are typical : For surgery and include both infection and further bleeding. Additional risks include infection and cataract. Overall, however, the benefits of modern vitrectomy far exceed the risks. With a combination of avastin, (bevacizumab) vitrectomy, and laser, I have seen excellent results. Vision often returns and the procedure is more efficient with small incision instruments.

Yes: Diabetic vitreous hemorrhage is routine for a well trained retinal surgeon, however most times the blood clears on its own. Ultimately though, i would follow the advice of your trusted retinal surgeon.