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
The most reliable provocative test for angle closure glaucoma – 
Select and explain. 
A. Homatropine mydratic test, B. Mydriatic – miotic test, C. Water drinking test, D. Dark room test
D: Dark room test
Answer: D: Dark room test 
Explanation: Two provocative tests have been described for prodromal stage (latent POAG) i) Prone-darkroom provocative test is the most popular and best physiological provocative test; ii) Mydriatic provocative test (not physiological).