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
Which is the commonest cause of occular morbidity in the community - 
Select and explain. 
A. Cataract, B. Refractive error, C. Occular injury, D. Vitamin A deficiency
B: Refractive error
Answer: B: Refractive error 
Explanation: Most common cause of blindness in India is cataract.
Second most common cause of blindness in India is refractive errors.
Most common cause of low vision is refractive errors.
And, refractive errors cause low vision in 100% of cases.
So, refractive errors should be the most common cause of ocular morbidity in India.