Hello I have gone through your query. I can understand your concern. For the diagnosis of diabetes mellitus or prediabetes it is necessary to do some tests like Fasting blood sugar test, Random blood sugar test or Glycated hemoglobin (A1C) test. If your ophtalmologist detected diabetic retinopathy,this means that you may have Diabetes. I want to underline that in your case it is possible even the diagnosis of Prediabetes.Patients with prediabetes are also at risk of developing the chronic complications of diabetes(like diabetic rethinopathy in your case.) Your Physician can be able to explain your exact situation after the blood sugar test results. About the copper-infused Miracle Socks ,i can say that it will be allowed. It is not a problem to use it in diabetics,if you maintain a good food hygiene. These Socks are claimed to work by increasing circulation and reducing swelling, thereby relieving aches and pains associated with varicose veins, fluid retention, and more. So,it can be helpful for you and of course it is allowed. Anyway ,it is better if you talk with your local doctor before you start using your copper-infused Miracle Socks . Hope this is helpful. If you have other doubts ,feel free and ask.I will be happy to help. Best regards.