BiguanidesPhenforminHydroxymercuribenzoatesDisinfectantsMetforminAcanthamoebaContact Lens SolutionsChlorhexidineHypoglycemic AgentsSwimming PoolsProguanilSparteineEye Infections, ViralAcanthamoeba KeratitisAmebicidesAcidosis, LacticSulfonylurea CompoundsMephenytoinAnti-Infective Agents, LocalTitrimetryAdenylate KinaseAdenovirus Infections, HumanContact Lenses