Objective: To determine the prophylactic effect of oral acyclovir on the recurrence rate of herpetic eye disease after penetrating keratoplasty.
Design: A randomized, double-masked, placebo-controlled multicenter trial.
Participants: Sixty-eight consecutive patients (68 eyes) with corneal opacities due to herpetic eye disease who underwent penetrating keratoplasty.
Intervention: Oral acyclovir 400 mg twice daily or placebo tablets for 6 months.
Main Outcome Measures: The recurrence rate of herpetic eye disease-related events and rejection episodes, proven by viral cell culture or polymerase chain reaction.
Results: During the 2-year follow-up period, there were 3 culture-proven herpetic eye disease recurrences in the acyclovir group and 9 in the placebo group. Lifetime survival analysis of the probability of remaining free from recurrence revealed a significantly reduced risk of recurrent herpetic disease in the acyclovir-treated group.
Conclusion: This study suggests that oral acyclovir effectively prevents herpes-related recurrences after penetrating keratoplasty in herpetic eye disease.
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