A clinician is evaluating several patients presenting to the urgent care clinic with a primary complaint of a 'red eye'. Match each of the following classic ocular presentations with its most likely primary differential diagnosis.
- Unilateral red eye, severe pain, seeing halos around lights, fixed mid-dilated pupil, and a cloudy corneaAcute angle-closure glaucoma
- Bilateral red eyes, severe itching, watery discharge, and cobblestone papillae on the upper tarsal conjunctivaAllergic conjunctivitis
- Unilateral red eye, severe pain, photophobia, and a branching dendritic corneal ulcer seen on fluorescein stainHerpes simplex keratitis
- Unilateral red eye, purulent discharge, crusting of lashes in the morning, and normal visual acuity without photophobiaBacterial conjunctivitis
Cevap
Presentation 1 matches Acute angle-closure glaucoma. Presentation 2 matches Allergic conjunctivitis. Presentation 3 matches Herpes simplex keratitis. Presentation 4 matches Bacterial conjunctivitis.
Each presentation contains classic pathognomonic or highly specific findings that accurately differentiate the major causes of a red eye: purulent discharge points to a bacterial etiology, severe itching to an allergic etiology, a dendritic ulcer to HSV keratitis, and a fixed mid-dilated pupil with halos to acute angle-closure glaucoma.
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Anahtar Kavram
Formulating a differential diagnosis for a 'red eye' based on distinguishing clinical features such as discharge type, presence of pain, visual acuity changes, and specific physical examination findings.