This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Microbiology
Central macular fixation develops at 
Select and explain. 
A. 3 weeks, B. 6 weeks, C. 3 months, D. 6 months
D: 6 months
Answer: D: 6 months 
Explanation: The critical period of developed of fixation reflex is 5-6 months of age.This is the reason why unilateral cataracts in children should be operated early.Remember - Binocular vision develops at 5-6 years.