Near or farsightedness, for example, does not affect the cornea. Donations from persons with eye problems such as glaucoma, corneal diseases or retinal diseases are needed for medical research. You can identify yourself as a donor on your driver's license, and most importantly, you should make your wishes known to your family. The retina is a thin, transparent tissue which covers the inside wall of the eye. It functions like the film in a camera.
Light passes through the lens of the eye and is focused on the retina.
The retina then transmits the light image via the optic nerve to the brain. A tear or detachment may develop in the retina in people who are nearsighted or who have a family history of detachments, in trauma to the eye, or in some cases because of disease. It is also possible that shrinkage of the vitreous body, the clear gel-like substance which fills the center of the eye, can be responsible for deterioration and tears. In some cases it may also be necessary to use a technique called vitrectomy. In this procedure the connected bands of vitreous are cut away from the retina and the shrunken vitreous is removed.