Retinal Detachment Surgery Download PDF, 10.4MB, PDF The retina, often referred to as the film of the eye, is the light-sensitive layer of the eye that detects images and send it to the brain via the optic nerve. Retinal detachment occurs when the retina is lifted off, or separated from, its normal position.When this happens, the retinal tissue starts to become unhealthy. If treatment is not instituted early, retinal detachment can lead to permanent loss of vision.Vitrectomy is the process of removing the vitreous gel, a jelly-like substance that fills the cavity of the eye. This surgery may be required based on the nature and location of the retinal tear, or presence of tractional membranes. [Please download the PDF file if you are unable to view the image below.]