Acuity | Foreign-body sensation | Photophobia | Discharge | Cardinal feature | Treat/refer | |
Lids/lashes | ||||||
Stye/hordeoleum | Normal | - | - | None | Tender | Treat |
Chalazion | Normal | - | - | None | Nontender | Treat |
Blepharitis | Normal | - | - | Dry crusting | Chronic | Treat |
Conjunctiva | ||||||
Conjunctivitis | ||||||
Bacterial | Normal | - | - | Mucopurulent | Discharge all day | Treat |
Viral | Normal | - | - | Mucoserous | None/URI | Treat |
Allergic | Normal | - | - | Mucoserous | Itching | Treat |
Nonspecific (toxic or dry eye syndrome) | Normal | - | - | Watery | ||
Episcleritis | Normal | - | - | None | Sectoral injection, dull ache | Treat |
Subconjunctival hemorrhage | Normal | - | - | None | Extravasated blood | Treat |
Cornea | ||||||
Abrasion | Normal or decreased | + | + | Watery | History/trauma defect revealed by fluorescein | Treat |
Contact lens overwear | Normal or decreased | + | + | Watery | History | Treat |
Foreign body | Normal or decreased | + | + | Mucoserous | History/trauma | Treat initially by attempt to remove by irrigation or swab; refer if still present after 24 hours |
Infectious keratitis | ||||||
Bacterial | Normal or decreased | + | + | Muco-purulent | White spot on cornea spots stains with fluorescein | Emergency referral (same day) |
Viral | Normal or decreased | + | + | Watery | Gray, branching opacity dendrite; dendrite revealed with fluorescein | Urgent referral (1 to 2 days) |
Anterior chamber/iris | ||||||
Iritis | Normal or decreased | - | + | None/watery | Ciliary flush, very small pupil | Urgent referral (1 to 2 days) |
Hyphema | Normal or decreased | - | +/- | None/watery | RBC "level" | Emergency referral (same day) |
Hypopyon | Normal or decreased | - | +/- | None/purulent | WBC "level" | Emergency referral (same day) |
Iris/lens | ||||||
Angle closure | Normal or decreased | - | +/- | None/watery | Fixed, mid-dilated pupil | Emergency referral (same day) |
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