This is true.
I usually get a 30 minute headache warning when my sight starts to go. It'll start like when someone takes a picture and the flash stays in your sight for a few seconds. I'll realise that I'm reading something but I can't see the actual word in front of me, just the ones either side of it. Then I lose my peripheral vision, I can wave a hand at the side of my head and not see it. That's when I know I need to go and find a dark room and try and get to sleep before the headache arrives. Although having said that, sometimes it's a false alarm and I just lose my sight for a few hours. It always surprises me how bad I am at navigating around my flat when I can't see, you'd think I would know it well enough by now.
( Kitty v1.0 desperately naive, Thu 10 Jun 2010, 12:36, Reply)