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: Unknown
All are abnormality in lens shape except : 
Select and explain. 
A. Spherophakia, B. Microphakia, C. Microspherophakia, D. Aphakia
D: Aphakia
Answer: D: Aphakia 
Explanation: Microphakia, spherophakia (microspherophakia) all are types of abnormal lens.
Microphakia – Abnormal smalleness of the lens of the eye.
Spherophakia (microspherophakia) – in spherophakia the lens is amall and spherical
(increase anterior and posterior curvature of lens) . Angle closure glaucoma occurs when the small round lens has blocked the flow of aqueous through the pupil.