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
Hirschberg test is used to detect: 
Select and explain. 
A. Squint, B. Field defects, C. Glaucoma, D. Optic atrophy
A: Squint
Answer: A: Squint 
Explanation: Ans. Squint