Retrospective Chart Review of Patients With Acanthamoeba Keratitis Who Have Received 0.8 mg/ml Polihexanide

This will be a non-interventional study with secondary use of data. The study will be a site-based retrospective review of medical chart of patients with AK who initiated and completed a treatment with 0.8 mg/ml polihexanide as part of a compassionate use program. Patientlevel data will be abstracted from medical chart of eligible patients at participating sites and imputed in an electronic case report form (eCRF). Baseline (Time 0) is the date of initiation of 0.8 mg/ml polihexanide. The study period is the period from T0 to the end of treatment. The clinical outcome needs to be confirmed at least 30 days after the conclusion of the treatment.