Re: small spot in my line of vision. not a floater
Ariaden: ******** an Amsler grid and test that eye in bright light. If there is a disturbance in the lines of the grid at that point, or a blindspot, or distortion, see an eye doctor. Mark the spot on the grid and take it with you.
If the spot is undetectable on the grid, it's probably nothing to worry about. A poster here has said that it's possible for floaters to be attached and not float.
It's my opinion that spots that appear bright, or swirling, or active in some way are the result of the neurons firing in that spot for some unknown reason.