A detached retina is a serious and sight-threatening event, occurring when the retina becomes separated from its underlying supportive tissue. The retina cannot function when these layers are detached. And unless the retina is reattached soon, permanent vision loss may result. It also called Retina Detachment. Symptoms and Signs: spots, floaters and flashes of light are the warning signs of a detached retina. Your vision might become blurry, or you might have poor vision. Another sign is seeing a shadow or a curtain descending from the top of the eye or across from the side. No pain is associated with retinal detachment. If you experience any of the signs, consult your eye doctor right away. Immediate treatment increases your odds of regaining lost vision. An injury to the eye or face can cause a detached retina, as the eyes can be very high levels of nearsightedness. Extremely nearsighted people have longer eyeballs with thinner retinas that are more prone to detaching. LASIK surgery, cataract surgery, tumors, eye disease and systemic diseases such as diabetes and sickle cell disease also may cause retinal detachments.