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
Fincham's test is used to: 
Select and explain. 
A. Diagnose congenital glaucoma, B. Diagnose acute congestive glaucoma, C. Differentiate diagnose of acute congestive glaucoma from cataract, D. Diagnose congenital cataract
C: Differentiate diagnose of acute congestive glaucoma from cataract
Answer: C: Differentiate diagnose of acute congestive glaucoma from cataract 
Explanation: Differentiate diagnose of acute congestive glaucoma from cataract