Retinal detachment is a condition in which the retina is separated from its normal position, leading to a schism between the neurosensory layer and the layer of retinal pigment epithelium. It is immediately blinding should it involve the central portion of the retina(the macula and fovea).

There are three different types of detachment :
Rhegmatogenous :
In this type of detachment, there is a full thickness defect seen in the retinal tissue(known variously as a tear, break or hole) leading to an ingress of fluid and subsequent detachment of the retina. Its onset is heralded often by sudden flashes of light or sudden perception of floaters in front of the eye. In large detachments, a curtain like opacity might descend in front of the eye. If involving the foveal centre, it may lead to blindness.