What is the definition or description of: detached retina?

Retinal detachment: The retina is the light sensitive layer in the back of the eye that transmits images to the brain via the optic nerves to create vision. If a hole or tear develops in the retina, eye fluids can separate the retina from underlying layer (choroid) . The most common cause of retinal holes or tears is traction from the vitreous, the clear gel that fils the inside of the eye and injuries.