A 56 year old man has painful weeping rashes over the upper eyelid and forehead for the last 2 days along with ipsilateral acute punctate keratopathy. About a year back, he had chemotherapy for Non-Hodgkin's lymphoma. There is no other abnormality. Which of the following is the most likely diagnosis?
Impetigo Systemic Lupus Erythematosus Herpes Zoster Pyoderma gangrenosum