I’ve had that from time to time. The brightness of the computer screen sometimes sets it off for me.
I used to get it only periodically, but I’ve just had it continually (even when my eyes are shut) for about three months now :( On the other hand, it sounds like everyone knows what I’m talking about which is good ^___^
Lol I thought I had a ‘hugs’ tag but I don’t… I nearly tagged this ‘huge feet’ (no, don’t ask me why I have that as a tag) which I think would have baffled you ;)