Painless disorder where patient may notice gradual raising or lowering of a curtain over the visual field of the affected eye. May occur with aging of eye or as a result of trauma. Caused by a detachment of the retina from the back of the eye, often from the “pulling” effect of the vitreous, the jelly-like ball that fills most of the eye behind the lens. Patient may also notice a sudden increase in “floaters” or flashing lights. Any such symptoms require an immediate visit to an ophthalmologist. See Free Eye Tests.