A friend of mine produces his own alcoholic beverages at home. He drinks these beverages since 3 years and he doesn't have any problems with his eyes. I drank one of his alcoholic beverages. It has been a year since I drank it. The drink he made contains %40-45 of alcohol and I drank approximately 400-500 ml of it. I didn't feel bad that night except being drunk. I slept well and even though I have headache too often, I didn't even suffer from headache that day. The thing that I am worried about, is it possible that the alcohol I drank can be methanol and I survived it? And is it possible that this alcohol damaged my eyes but I am not aware of it?