What happens if retinal detachment?

Black curtain.: If the retina detaches from the back of the eye, you will see a black curtain or veil in the area that the retina is detached. If left untreated the curtain will not go away and could progress ultimately leading to complete blindness of the eye.

See a retina doctor: The most common cause for a retinal detachment is due to a retinal tear or hole (rhegmatogenous). Less common causes include scar tissue growing on the retina (tractional) or inflammatory fluid collections (serous). Rhegmatogenous detachments are treated surgically, preferably before the central retina (macula) becomes detached, which can lead to a less favorable visual prognosis.