This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
Commotio retinae is seen in: 
Select and explain. 
A. Concussion injury, B. Retinopathy of AIDS, C. Central vein thrombosis, D. Central aery thrombosis
A: Concussion injury
Answer: A: Concussion injury 
Explanation: Ans. Concussion injury