The retina is the ocular mechanism at the back of the eye which receives incoming light in the form of images, and then transmits the images to the brain. The retina is one of three layers of the eye. If the eye is referred to as a camera, consider the retina to be the film.

When the retina pulls away from the back wall of the eye, it is termed a detachment. The retina cannot work in this position and the result is blurry vision or vision loss. Symptoms also include flashing lights, or a "curtain" coming down the field of vision. Blindness can be the consequence when immediate treatment by an ophthalmologist is not sought.

Some conditions increase the likelihood of retinal detachment: family history of retinal detachment or previous detachment in one eye, trauma to the eye, cataract surgery, glaucoma, and nearsightedness. Your ophthalmologist should be informed of any such history or condition during your routine annual care.