None. This is called a posterior vitreous detachment. The gel inside your eyes, vitreous, has partially liquefied & is pulling away from the retina which lines the back of your eye. This is a normal with aging. This causes floaters. The only concern is if it begins to pull on the retina & tears it. Retinal tears can lead to retinal detachment & blindness. Go to your doctor immediately if you start to.
Usually none needed. Sounds like you have had a posterior vitreous detachment. This is a normal thing at around age 55. Most of the time it's harmless, and no treatment is needed. If you start to get brief flashes of light at the edge of the vision, a big increase in floaters, or any changes in the side vision, these may indicate a retinal detachment, and prompt examination by an ophthalmologist would be important.
Maintain awareness. This is called posterior vitreous detachment and when it first occurs an immediate dilated eye exam is necessary. If your eye doctor finds no retinal damage then you should keep watch for new onset floaters or flashes of light as these are both symptoms of a possible retinal tear. Those symptoms should prompt a call to your eye doctor for another dilated exam. Otherwise this is a benign event.
Floaters. As we get older, part of the vitreous (the jelly-like stuff in the back of the eye that keeps our eye in the shape that it is in) will slowly liquify and cause what we see as floaters. Most floaters do not require any treatment.. If they are bothersome enough to affect daily activities, a laser procedure or surgery to remove the jelly and floaters can be done. New floaters require urgent eval.