An 18 year old female has peri-orbital blisters. Some of them are crusted, others secreting pinkish fluid. What is the most likely diagnosis?

The key is A. Shingles. [Herpes zoster ophthalmicus occurs when the varicella-zoster virus is reactivated in the ophthalmic division of the trigeminal nerve. Herpes zoster is a common infection caused by the human herpesvirus 3, the same virus that causes varicella (i.e., chickenpox).