%0 Journal Article %A R J Boucherat %T Herpes zoster ophthalmicus with trochlear nerve involvement after alcohol injection into the Gasserian ganglion. %D 1971 %R 10.1136/bjo.55.11.761 %J British Journal of Ophthalmology %P 761-765 %V 55 %N 11 %U https://bjo.bmj.com/content/bjophthalmol/55/11/761.full.pdf