A condition in which the neurosensory layers of the retina separate from the retinal pigment epithelium (RPE), allowing vitreous fluid to enter the sub-retinal space. The cells in the detached part of the retina are no longer able to derive nutrients from the choroid and this can result in permanent blindness if the retina is not re-attached early enough. The older population and highly myopic eyes are more susceptible to detachments. They are often caused by head trauma and sudden harsh movements such as in bungee jumping. Diseases such as diabetic retinopathy and scleritis can also increase the risk of retinal detachments.