This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diseases of Cornea, Subject name: Ophthalmology
Which of the following is not an association for Keratoconus: 
Select and explain. 
A. Marfans Syndroma, B. Leber congenital amaurosis, C. Vernal kerato conjunctivitis, D. Senile Cataract
D: Senile Cataract
Answer: D: Senile Cataract 
Explanation: Senile cataract is not an association with keratoconus Impoant Associations of Keratoconus Marfans Leber congenital amaurosis Vernal kerato conjunctivitis Down's syndrome Atopy Floppy eyelid syndrome Ehler Danlos Achondroplasia Alagille syndrome Ape syndrome