Retinal detachment is generally preventable, but if not caught
on time, it could cause permanent vision loss. Medical attention
should be sought as soon as possible, ideally within the first
24 hours of the first symptoms. To make sure you can spot it
early, here is a guide to the basics of retinal detachment:  The
retina is a vital layer of skin attached to the back of the eye.
Its primary function is to sense light, recording it much like
film in a camera. An underlying layer of blood vessels provides
the retina with oxygen and nutrients. Retinal detachment occurs
when a situation causes the retina to separate from the
blood vessels, depriving it of necessary nutrients. Detachments
usually begin with a tear or a hole in the retina. Eye fluids
leak through the hole, building up under the retina until it
separates the two layers. The U.S. National Library of Medicine
astutely compares the process to an air bubble under
wallpaper, and in this case, the wallpaper comes
off. Occasionally, fluid can leak undernea