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Stem
A 72-year-old retired teacher develops a burning, itchy pain over the right forehead and upper eyelid, with a few grouped vesicles on the same side that appeared 36 hours ago. Two days before the rash he had mild headache and denied trauma. On examination a few vesicles are visible on the right side of the tip of the nose and on the upper eyelid. Visual acuity is 6/9 right eye, 6/6 left. Slit-lamp cannot be done at this hour.
Questions
a) What is the most likely diagnosis and what specific clinical features support it? (2 marks)
b) Name the red-flag sign in this patient and the related ocular complications. (2 marks)
c) Outline your immediate management plan (drugs, dose, route, timing) and any specialist referrals. (3 marks)
d) What is the most common and disabling longer-term complication in this patient, and how is it managed if it persists beyond 3 months? (3 marks)