<prompt> Commotio retinae affects which pa of retina -Posterior polePeripheral retinaInferior-nasal paSuperior-nasal pa  <response>: Commotio retinae Berlins oedema: It is of common occurrence following a blow on the eye. It manifests as milky white cloudiness involving a considerable area of the posterior pole with a cherry-red spot in the foveal region. It may disappear after some days or may be followed by pigmentary changes. Ref: AK Khurana 4thE pg 406 