Acanthamoeba keratitis is an inflammatory eye infection caused by a type of ameba called Acanthamoeba, according to the Centers for Disease Control and Prevention. This eye infection most commonly affects people who wear contact lenses, though anyone can develop infection symptoms. People who exhibit Acanthamoeba keratitis symptoms should seek care from an eye doctor as soon as possible. In the absence of prompt treatment, Acanthamoeba keratitis can lead to permanent vision complications.
Eye Irritation and Pain
The most common symptoms associated with this type of eye infection are excessive eye irritation and pain. Typically, the affected eye appears persistently red or bloodshot, even after removal of the contact lenses, the American Optometric Association reports. During the initial stages of infection, certain people may not develop eye pain; however, as the infection advances, people may experience mild to severe eye pain symptoms.
Increased Light Sensitivity
Photophobia, or increased sensitivity to light, can arise in people with Acanthamoeba keratitis, the American Academy of Optometry warns. Light sensitivity may make it difficult for people to participate in their usual daily activities, such as exercising outdoors or going to work or school. Upon exposure to light, people with photophobia may close or cover their eyes to limit sensations of eye discomfort.
Foreign Body Sensation or Excessive Tearing
This type of eye infection may cause people to experience an unusual foreign body sensation within the affected eye, according to the American Optometric Association. Eye discomfort or irritation can cause people to frequently rub or scratch at the infected eye, which may lead to excessive tearing of the eye. Touching the affected eye can also exacerbate symptoms of eye redness or irritation.
Blurred Vision
Vision changes, such as blurred or cloudy vision, may occur in people with Acanthamoeba keratitis, the CDC warns. Frequently blurred vision can interfere with a person's ability to read, move about or drive. People who experience any type of vision changes should be evaluated by a medical professional as soon as possible. Permanent vision loss can occur in people who do not receive prompt or appropriate treatment to eliminate this eye infection.
