Wynn, yes I have problems in typing too ... interesting that you identified using the correct finger on the wrong hand. I often mistype a complete wrong word, but it always has the same number of letters as the word I meant, and some related sound. Like: I will want to type "last," but will type "best" instead.
My eye problems are double vision in reading and a rapid deterioration in my sight since the ALS began. I assume the poor eyesight is age, but the double vision is troublesome.
Welcome to the forum, by the way. I'm sorry you have to be here, but am glad you found us!
Beth