system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A patient using contact lens develops corneal infection. Laboratory diagnosis of acanthamoeba keratitis was established.The following is the best drug for treatment-
assistant
The correct answer is  Polyhexamethylene biguanide PHMB (Drug of choice) Chlorhexidine is an alternative