Papillae are seen in -
Trachoma
Viral conjunctivitis
Spring catarrh
All the above
Papillae are seen as reddish raised areas with flat tops and velvety appearance. These represent areas of vascular and epithelial hyperplasia. Papillae are seen in following conditions:  Trachoma  Spring catarrh  Allergic conjunctivitis  Giant papillary conjunctivitis ref: A K KHURANA OPHTALMOLOGY,E4, Page-470
Conjunctiva