serious causes of a RED EYE
| features on history or examination | serious causes of a RED EYE |
| Severe eye aching | IritisKeratitis Acute Angle-Closure Glaucoma Scleritis Orbital Cellulitis Cavernous Sinus Thrombosis (CST) |
| Prominent photophobia | Iritis Keratitis |
| Impaired vision | IritisKeratitis Acute Angle-Closure Glaucoma Orbital Cellulitis CST |
Cloudy cornea | Keratitis Acute Angle-Closure Glaucoma |
Corneal opacification | Keratitis – Chemical Or Infectious |
Circumcorneal conjunctival injection | IritisKeratitis |
| Cloudy anterior chamber | Iritis |
| Pain on eyeball palpation | Scleritis (+++) Orbital Cellulitis CST |
| Proptosis | Orbital Cellulitis CST Posterior Scleritis |
| Impaired, or painful, extraocular eye movements | Orbital Cellulitis |
| Fever, toxic appearance | Orbital Cellulitis (+)CST (++) |
| Hyper purulent discharge from an “angry” eye | Gonococcal Conjunctivitis/Endophthalmitis |
| Prominent nausea and vomiting | Acute Angle-Closure Glaucoma |
| Small, irregular, poorly-reactive pupil | Iritis |
| Fixed mid-dilated pupil | Acute Angle-Closure Glaucoma |
| Increased intra-ocular pressure | Acute Angle-Closure Glaucoma Iritis (Secondary Complication) |
| History of connective tissue disease, or granulomatous disease | Iritis Scleritis |