Viral keratitis is characterized by photophobia, foreign body sensation, and watery discharge. A faint branching grey opacity may be seen on penlight exam, and dendrites may be seen with fluorescein.
Scleritis involves severe, boring pain of the eye in addition to photophobia and headache. It is usually associated with systemic inflammatory disorders.
Subconjunctival hemorrhage is asymptomatic and occurs following trauma.
Cellulitis manifests following trauma with a deep violet color and marked edema.