YES!!
I actually totaled a car awhile back because some reallly old guy (90+) was driving his station wagon...I was going through an intersection on a green light...he just turned left right in front of me!!
The police told me that based on how badly damaged my car was, they were shocked that we were not seriously injured/killed.
Maybe if a doctor would have reported his terrible eyesight, he would not have been on the road...
In this case, was it proven that his bad eyesight was the cause of the accident?