Abrupt onset of redness, irritation, and watering of the eye
Pain is unusual
Vision unaffected
50% of cases are bilateral
Vasodilatation of the superficial episcleral vessels
Focal area(s) of redness
May have a tender scleral nodule (nodular<unk>
Episcleritis
Nontraumatic
Scleritis
Acute angle-closure glaucoma^
Corneal ulcer
Anterior uveitis
Central retinal artery occlusion
Conjunctivitis