Commotio retinae affects which pa of retina-

*Berlin's oedema, also called commotio retinae, occurs in blunt trauma to 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: Khurana 7th/e p.448