This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Conjunctiva, Subject name: Ophthalmology
Giant papillary conjunctivitis is seen 
Select and explain. 
A. Trachoma, B. Contact lens, C. Phlytenular conjunctivitis, D. Vernal kerato conjunctivitis
B: Contact lens
Answer: B: Contact lens 
Explanation: It is the inflammation of conjunctiva with formation of very large sized papillae. Etiology :It is a localised allergic response to a physically rough or deposited surface (contact lens, prosthesis, left out nylon sutures). Probably it is a sensitivity reaction to components of the plastic leached out by the action of tears. ref: A K KHURANA OPHTALMOLOGY,E4, Page-77