You are seeing the impact of long term lack of glucose control.  It has massive circulatory problems and it's impacting its ability to control fine motor function and feel. The eyes are some of the first things to go, they receive a large blood supply and get a lot of initial and continuing damage from out of control glucose. Remember, even if a fat isn't eating sugar, the liver metabolizes fat into sugar.  The liver of a fat is essentially diseased and constantly releasing a stream of glucose in response to high insulin resistance. It's why fats are usually in metformin.  Metformin's primary purpose is shutting down hepatic gluconeogenesis pathways.