A retinal detachment occurs when fluid collects underneath the retina, separating the retina from the back surface of the eye. Usually, retinal tears (see above) cause retinal detachments by allowing a pathway for fluid in the eye to collect under the retina. When the retina becomes detached it can result in loss of vision affecting either part or all of a person’s vision. Retinal detachments are an emergency and require immediate treatment by a retina specialist. Symptoms of a retinal detachment include sudden onset of floaters, flashing lights, a “curtain” or “veil” covering a field of your vision, or loss of vision.