This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Ophthalmology
Commotio retinae is 
Select and explain. 
A. Oedema of cornea following blunt trauma, B. Oedema of retina following blunt trauma, C. Injury to anterior part of lens, D. Injury to sclera
B: Oedema of retina following blunt trauma
Answer: B: Oedema of retina following blunt trauma 
Explanation: (B) Oedema of retina following blunt trauma # COMMOTIO RETINAE (Berlin's oedema): Common occurance following a blow on the eye"> 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.