Yep he has drop eye. There isn't anything you can do to fix it, most Silver aros will get it. You can try to prevent it by feeding well, low fat. Some try to float pingpong balls or blinking lights above the tank. I personally believe that it is genetic.
Thats what some people try, and there are members on the forum that swear by floaters and blinking lights. But as I said I still believe it is genetic inbreeding.