The retina is the light-sensitive layer of tissue that lines the inside of the eye and sends visual messages through the optic nerve to the brain. When the retina detaches, it is lifted or pulled from its normal position. In some cases there may be small areas of the retina that are torn. These areas, called retinal tears or retinal breaks, can lead to retinal detachment. Symptoms include a sudden or gradual increase in the number of floaters, which are little “cobwebs” or specks that float about in your field of vision, and light flashes in the eye. Another symptom is the appearance of a curtain over the field of vision. A retinal detachment is a medical emergency, and if not promptly treated, can cause permanent vision loss.
Facts About Retinal Detachment. National Eye Institute (May 22, 2018), https://nei.nih.gov/health/retinaldetach/retinaldetach