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
Secondary detion of the eye is based on the following law: 
Select and explain. 
A. Hering's, B. Listing's, C. Donder's, D. Sherrington's
A: Hering's
Answer: A: Hering's 
Explanation: Ans. Hering's