I've had this on and off for about 2-3 years but it is still really worrying me.
I'll describe it as best as I can in the hope that someone else understands, as I have been to 2 opticians and they say its nothing but am still so worried.
Basically, all of a sudden at any time of day I will realise something is not quite right with vision then if I blink at a computer or tv screen or at the sky I will notice a small bright silver blob somewhere in my vision(just like when a camera is flashed in your eye) in one eye or the other but not usually in the same eye at the same time (although yesterday I had it several times during the day and in the same eyes at the same time!!). It will last from a few seconds to up to 10 mins (usually 1-2 mins) and then gradually fade to nothing.
Its not the same as migraine with aura as I have experienced that during both of my pregnancies and a few times since. When I get those I will loose parts of my vision in both eyes, then the classic zig-zig comes along will move acros my vision and I will usually then get a headache but I dont get a headache with this. Its also not the same as the tiny sparkly dots you get when looking at a bright sky (I cant remember the name of this) as I get that too!!
I am really hoping someone understands what I am talking about! My husband says its dehydration (I should drink much more than I do during the day I must admit) but I cant find any info on this online.