<prompt> Which of the following is not true regarding herpes zoster ophthalmicus:Frontal nerve is most common nerve involvedDendritic ulcers are seenPunctate epithelial keratitisCranial nerves can also be involved  <response>: Pseudodendritic and not dendritic ulcers are seen. Herpes zoster ophthalmicus Acute infection of Gasserian ganglion of 5th cranial nerve by VZV MC nerve involved Frontal nerve, most specific nerve involved: Nasociliary Can involve all pas of eye though they are strictly limited to one side of head Pseudodendritic ulcer: HZV Acanthamoeba. Pseudodendrites dont have terminal bulbs as seen in dendritic ulcer and more peripheral. Ocular Features Follicular conjunctivitis hemorrhagic conjunctivitis Punctate epithelial keratitis Nummular keratitis: Tiny granular deposits surrounded by stromal haze Disciform keratitis Dendritic ulcers are caused by Herpes Simplex Virus not HZV 