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 term anisometropia indicates 
Select and explain. 
A. Refractive error, B. Long vision, C. Sho vision, D. Ageing process
A: Refractive error
Answer: A: Refractive error 
Explanation: Ans. Refractive error