Acanthamoeba Keratitis

Acanthamoeba keratitis is a rare but serious infection of the cornea caused by the Acanthamoeba species, typically associated with contact lens wear, particularly in individuals who do not follow proper hygiene practices. Key clinical points include: 1) It can lead to severe pain, photophobia, and vision loss if not treated promptly. 2) The condition is often misdiagnosed as bacterial or viral keratitis. 3) Risk factors include improper contact lens care, exposure to contaminated water, and immunocompromised states. The etiology involves the Acanthamoeba organism, which can invade the corneal epithelium and stroma, leading to inflammation and ulceration. Clinical presentation typically includes redness, tearing, and a sensation of a foreign body in the eye. Diagnosis is confirmed through corneal scraping and culture, as well as PCR testing for Acanthamoeba DNA.