Clinical example

A 22-year-old schoolteacher complains that her right eye is red and irritated. You note moderate injection of all of the conjunctival blood vessels, a watery discharge, and a palpable preauricular node.

Vision	Normal
Conjunctiva	Diffusely injected
Discharge	Clear
Corneal opacities	None
Epithelial disruption	None
Anterior chamber	Normal
Pupils	Normal
Other symptoms	Recent upper respiratory tract infection