This spot is what I see as part of my vision not something I can see in a mirror. It appears to be about 3/8" to 1/2". It disappears after standing up and moving around but remains if I continue to lay down. When I close my eye, it is still there but has no color. It moves with my focus. It does not float. I did have cataract surgery two months ago. This started about a month later. I am totally blind in my other eye. I have seen by my Ophthalmologist (Scheie Eye Institute) but so far no explanation