My husband was out all day on a boat in the sun, when he came back home he was seeing a large brown spot in his vision the size of about a 25cent coin, he does wear glasses and he did not have them on when he was out in
the boat, could this be a migrane coming on, or signs
of a stroke
, or simply the cause of over exposure in the sunlight out on water? he does not have any other physical ailments and he is feeling fine except for his vision.