Chronic catarrhal conjunctivitis is a chronic inflammation of the conjunctiva that can result from an improperly treated acute conjunctivitis, continuous irritation from smoky or dusty environments or alcohol abuse, or local causes like misplaced eyelashes or chronic dacryocystitis. Symptoms include burning, grittiness, and photophobia, while signs include congested palpebral conjunctiva and a thin sticky discharge. Treatment involves removing all irritants, using antibiotic eye drops if infection is present, applying astringent drops to relieve congestion, and painting the conjunctival sac with silver nitrate for severe cases.