Retinal Detachment is a separation of the retina (the inner nervous tunic of the eye) from the choroid (the middle, vascular tunic of the eye) in the back of the eye, usually resulting from a hole in the retina that allows the vitreous humor (fluid) to leak between the choroid and the retina.

The retina is a thin, transparent tissue of light-sensitive nerve fibers and cells. It covers the inside wall of the eye the same as wallpaper covers the walls of a room.

Most retinal detachments are caused...