I had a sudden strange partial loss of sight in one eye. There was a white spot that blotted out a part of my vision. When I stared at someone s face, I couldn t see the right side of there face. This was accompanied by a strong headache and a kind of dizziness or vertigo. I d say it lasted for a couple of hours. Someone I know said this could ve been some kind of minor stroke, though this seems dubious to me.