I had a problem with seeing a white arc that I was seeing with movement of my left eye movement a few months ago. It's still there but not so bad. But I now have a new problem. On the 20th Feb, 4.5 months ago, I went to the hospital for a pupil dilation exam to see why I was seeing the white arc. No problem was found, but ever since then I have on odd occasions experienced this other problem -- a roundish patch of pixelated vision in the same left eye around the centre of my left eye vision. It was appearing maybe once a day for between 10-20 mins. Thought it was a new floater initially but it's not. There's no problem with my right eye.
Anyway, at first it was lasting around 20 minutes and quite bad. In recent weeks they're only been lasting 5 minutes and are much less noticeable. If I look at the sky in the daylight I can see it during those 5 minutes, although sometimes I can't and it only becomes visible when I move my eye.
The severity of the episodes tends to be decreasing as time goes on, but not the frequency with which they occur.
I think that sometimes they are brought on when I'm bent over doing something then I straighten up. So something to do with change in blood pressure? Also they appear to be occurring more frequently when I'm feeling stressed, but I can't say this for definite.
Anyway, a bit reluctant to go back for further tests as it seems it was the eye dilation exam that precipitated it in the first place, either that or the eye drop. Any suggestions as to the likelihood of what it might be?