Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Acanthamoeba - Granulomatous Amebic Encephalitis (GAE); Keratitis ?
    ### Response:
    Early diagnosis is essential for effective treatment of Acanthamoeba keratitis. The infection is usually diagnosed by an eye specialist based on symptoms, growth of the ameba from a scraping of the eye, and/or seeing the ameba by a process called confocal microscopy.
    