Fabiola you are describing a vitreous floater. Use the search feature, archives and health topic to read about floaters.
use Google and search the term floaters for more information. Use Google IMAGES and search floaters to see pictures of what they look like and where they are in your eye.
If you have not had an eye exam in the last year see an Eye MD ophthalmologist.
JCH III MD
Did you have Restor implants after cataract surgery? I have had them too. Spider moves with focus changes. PS Spider is not there and setps do not move and slants or level areas do not move. Restor is garbage!