The role of oral acyclovir (ACV) in the management of immunocompetent
patients with herpes zoster ophthalmicus remains controversial. We hav
e performed a retrospective, comparative, case-control sutdy of cases
seen in the Zoster Clinic at Moorfields Eye Hospital over the last 5 y
ears. A standard proforma was used during this period to collect data
on the rash, ocular involvement and treatmetn. There were 419 immunoco
mpetent patients of whom 77 were treated with oral ACV prior to attend
ing the clinic. We compared these with paired controls matched for age
, sex and severity of rash. No difference in the rate of ocular compli
cations between treated and untreated patients could be detected. This
suggests that oral ACV as currently prescribed has little or no preve
ntative effect on the ocular complications of ophthalmic zoster.