Hi Celeste,

When you say it was "grey" it reminds me of my torn retina. I had one big grey glob in my visual field (only the left eye) a few years ago. The grey went away that morning, then I saw rainbows around lights for a while. Then it went away. I had flashing lights after that. It was a fluid from behind the retina which caused the grey. It was painless when it happened and I hesitated to get it checked out. When I did, it was laser surgery.

Jen