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
In optic neuritis the best investigation to be done includes: 
Select and explain. 
A. Goldman perimetery, B. Keratoscopy, C. Ophthalmoscopy, D. Opthalmodynamometery
A: Goldman perimetery
Answer: A: Goldman perimetery 
Explanation: Ans. Goldman perimetery