Papillae are seen in -
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
Trachoma
Viral conjunctivitis
Spring catarrh
All the above
Conjunctiva