This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lens, Subject name: Ophthalmology
Polyopia/diplopia is seen in which type of cataract- 
Select and explain. 
A. Nuclear, B. Coical, C. Posterior subcapsular, D. Anterior polar
B: Coical
Answer: B: Coical 
Explanation: In coical cataract: Uniocular polyopia (i.e., doubling or trebling of objects) occurs due to irregular refraction by the lens owing to variable refractive index as a result of cataractous process.