“Red eye” (conjunctival hyperemia), conjunctival discharge, eyelids sticking (worse on awakening from sleep), and foreign body sensation, duration >4 weeks (otherwise see 5.1, Acute Conjunctivitis).
Parinaud oculoglandular conjunctivitis (see 5.3, Parinaud Oculoglandular Conjunctivitis).
Silent dacryocystitis (see 6.11, Dacryocystitis/Inflammation of the Lacrimal Sac).
Contact lens related (see 4.21, Contact Lens-Related Problems).
Conjunctival tumors (see 5.13, Conjunctival Tumors).
Autoimmune disease (e.g., reactive arthritis, sarcoidosis, discoid lupus, and others).