Two patients presented with dendritiform epithelial irregularities of the cornea that were unresponsive to topical acyclovir. Both were soft contact lens wearers who had practiced inadequate lens hygiene. Acanthamoeba was cultured from a shallow corneal biopsy of one patient and from the contact lens of the other. Epithelial debridement resolved the condition in both patients without concomitant treatment with antiamoebic agents.