1. – – – – – Allergic conjunctivitis Hordeolum or stye Chalazion Corneal abrasion Conjunctival, corneal or intraocular foreign bodies – – – – Acute angle -closure glaucoma Chemical burns Blunt or lacerating ocular trauma Uveitis (iritis)

2. DIFFERENTIAL DIAGNOSIS OF EYE SYMPTOMS OR OCULAR PAIN – – – – – – – – – – – – – – Hordeolum Chalazion Acute dacryocystitis Exposure to irritants Conjunctival infection Corneal abrasion Foreign-body irritation Corneal ulcers Ingrown lashes Abuse of contact lens Scleritis Acute angle-closure glaucoma Uveitis (iritis) Referred pain from extraocular sources such as sinusitis, tooth abscess, tension headache, temporal arteritis or prodrome of herpes zoster