vitrectomy or vitreous drainage is the surgery to remove all or part of the vitreous of the eye in order to remove the vitreous opacity. Vitrectomy can last from one to several hours. During this surgery, the ophthalmologist makes a small incision or special blades. It is used to use the tool in the sclera. He or she will use a microscope and a very small instrument to look inside your eye to do one or more of the following:

• Removing wounds and injuries from the retina
• Returning the retina to its correct position behind the eye
• Solving the cloudy vitreous problem
• Cataract removal
• Use of laser to fix retinal tear