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
Best method of detection of retained glass intraocular foreign body is 
Select and explain. 
A. Radiography, B. Usg, C. Tonometry, D. CT scan
D: CT scan
Answer: D: CT scan 
Explanation: In CT or MRI, accurate foreign body localization is possible.