Four years ago, a blind gun owner in New Jersey managed to shoot himself (it also happens with sighted individuals). Police acted to protect him from himself by seizing six of his guns. After after a four year court battle, a court ruled he still had the 2A right to own firearms even if blind and ordered the guns returned. During the litigation, the government made some allegations of habitual drunkenness which the gun owner denied.
I'm not so sure that pre-Heller
that the owner would have gotten his firearms back. The judge apparently based his decision squarely on the Second Amendment and I've never thought of New Jersey being gun friendly. It is a real shame, though, that it took four years to get them back.