Could be a detached retina. Have the jelly removed and replaced with saline - not sure, but it could be true. I had a macular hole where the jelly was removed and replaced with something, maybe it was saline ? You don't feel a thing during the operation I can assure you (and you can't see anything either, even with a local anaesthetic which I had) but quite unusual afterwards with a macular hole - they pump gas behind the eye to help it heal and I had to have my head looking downwards for Two Weeks !! Couldnt watch TV and only look up for ten minutes in every hour until the gas dispersed, very wierd with plenty of talking books ... and a stiff neck... if the floaters don't disperse, go to your local eye hospital. If you are near London I would recommend Moorfields every time.