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
In which of the following condition, constantly changing refractive error is seen: 
Select and explain. 
A. Trauma cataract, B. Morgagnian cataract, C. Incipient cataract, D. Diabetic cataract
C: Incipient cataract
Answer: C: Incipient cataract 
Explanation: In incipient cataract the refraction changes with considerable rapidity and should be corrected at frequent interval.