The surgery, called a pars plana vitrectomy with air tamponade, is commonly performed to fix retina tears or detachments by replacing part of the vitreous fluid inside the eye with air ...
A retinal tear is a common age-related eye condition. It causes eye floaters and flashes of light and may lead to more severe vision problems. On its own, a torn retina will not damage your eyesight.
Cataract surgery ... vitreous cavity, restoring limited but completely unfocused vision. Centuries later, the technique was modified so that a sharp fine instrument was inserted into the eye ...