Hello, Treatment for diabetic retinopathy is generally very effective in delaying or reducing vision loss but it can t cure the disease.People with diabetic retinopathy needs frequent monitoring to look for any new changes in their eyes and in general most of the retinopathy patients require repeat treatment. As far natural therapy is concerned,currently there are no proven alternative or complementary therapies than can cure diabetes or diabetic retinopathy. It s important not to delay standard treatments to try unproven therapies.  Following are the Potential alternative therapies .... Ginkgo Grape seed extract Pycnogenol (Pine bark) If you really want to try them,you must take them by permission from your doctor,since they can cause interactions with other medications or cause some complication like bleeding. Thanks.