This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorders of Conjunctiva, Subject name: Ophthalmology
Maxwell Lyon's sign is a feature of: 
Select and explain. 
A. Trachoma, B. Spring catarrh, C. Epidemic keratoconjunctivitis, D. Acanthamoeba keratitis
B: Spring catarrh
Answer: B: Spring catarrh 
Explanation: A/K/A warm weather ketratoconjuctivitis /Vernal ketratoconjuctivitis more common in young boys spontaneously resolves at age of pubey type of type 1 HSN (IgE mediated )type 1>type 4. features - cobblestone appearance (hall mark)(large papillae) Maxewell lyon sign - coagulated coppy dishrage forming psudomembrane seen on the eversion of the eyelid. Horner tranta spots DOC-sodium cromoglycolate (Mast cell stabliser)