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Fluorescein under blue light in a patient with shingles

Clinical history

Urgency
Urgent

A 74-year-old with a vesicular rash on the right forehead for five days now has a red, painful, photophobic eye.

Examination
Dermatomal vesicles, conjunctivitis, pseudodendrites and punctate keratitis, sometimes uveitis or raised pressure; a lesion on the nose tip predicts eye involvement.

Presentation typical of this diagnosis, written for teaching. The source dataset provides the image and its label only, with no accompanying clinical record.

The study opens when you begin.

Read the history first and decide what you expect to find. Committing to an expectation before you look is most of what separates interpreting from noticing.

Step 1 of 3 · Read the history

Study: Slit-lamp photograph

Describe the abnormality and give the most likely diagnosis. You will locate the finding first; the answer options stay hidden until you have.