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
Spontaneous absorption of lenticular material is seen in- 
Select and explain. 
A. Myotonic dystrophy, B. Hallermann Streiff syndrome, C. Aniridia, D. Persistent hyperplastic primary vitreous
B: Hallermann Streiff syndrome
Answer: B: Hallermann Streiff syndrome 
Explanation: Sometimes there may occur total or paial absorption of congenital cataract, leaving behind thin membranous cataract. Rarely there is complete disappearance of all the lens fibres and only a fine transparent lens capsule remains behind. Such a patient may be misdiagnosed as having congenital aphakia. This is associated with Hallermann-Streiff-Francois Synodrome.