Hypopyon

The accumulation of white blood cells forming a visible white or yellow pus in the anterior chamber of the eye.

Causes

• HLA-B27 associated uveitis

• Behçet's disease

• Corneal ulcers (microbial keratitis)

• Endophthalmitis

• Ocular syphilis

• Physical trauma

• Chemical burns

• Adverse drug reaction: Rare systemic or topical medications (such as rifabutin)