Most common nerve involved in herpes zoster ophthalmicus is: (A) Frontal, (B) Lacrimal, (C) Nasaciliary, (D) Oculomotor
Answer is A. HZO is an acute infection of Gasserian ganglion of the fifth cranial nerve by the varicella-zoster virus (VZV). VZV is a DNA virus and produces acidophilic intranuclear inclusion bodies. It is neurotropic in nature. In HZO , frontal nerve is more frequently affected than the lacrimal and nasociliary nerves. Ref: khurana 6 th edition page no.104