Must distinguish from scleritis
Scleritis likely to have pain and decreased vision
Use of 2.5% phenylephrine drops will cause vasoconstriction/blanching of episcleral but not scleral vessels. Thus, there will be decreased injection and redness in<unk>  but not scleritis.
Red area will be mobile if moved with a moist q-tip
Must distinguish from conjunctivitis<unk>  will usually have a sectoral pattern of injection, as opposed to a diffuse injection seen in conjunctivitis.
Scleritis likely to have pain and decreased vision
Use of 2.5% phenylephrine drops will cause vasoconstriction/blanching of episcleral but not scleral vessels. Thus, there will be decreased injection and redness in<unk>  but not scleritis.
Red area will be mobile if moved with a moist q-tip<unk>  will usually have a sectoral pattern of injection, as opposed to a diffuse injection seen in conjunctivitis.
Episcleritis
Nontraumatic
Scleritis
Acute angle-closure glaucoma^
Corneal ulcer
Anterior uveitis
Central retinal artery occlusion
Conjunctivitis