I have that kind of hallucination off and on. Sometimes it goes beyond just being out of the corner of my eye. I'll be working on my laptop and see movement over the top of the display. When I look, it's there long enough for me to tell what it was and then it's gone. I also have similar auditory hallucinations. I hear a sound or someone talking and when I pay attention to it, it goes away.

I am bipolar. My psychiatrist has had me on anti-psychotics for a couple of years. I was on Saphris for about a year and now I'm on Seroquel. He's not really sure why the hallucinations continue even though I'm on anti-psychotics, but he said they are so infrequent and they don't stick around, it's likely not something I need to worry about. I'm pretty sure they would be worse if I wasn't on an anti-psychotic.

I know it can be upsetting. For me it's just a bit unsettling. I suppose it's that way because I realize it's just a symptom of my bad brain chemistry. Talk to your doctor. Be sure to tell him/her about them in detail. Having them the way you are shouldn't interfere with your life unless they happen all the time.

Hope this helps.