Acanthamoeba keratitis

Acanthamoeba keratitis (AK) is an infection of the cornea, the clear 'window' at the front of the eye, that can be very painful.

What is acanthamoeba keratitis?

Acanthamoeba keratitis (AK) is an infection of the cornea, the clear ‘window’ at the front of the eye, that can be very painful. The infection is caused by a microscopic organism called scanthamoeba, which is common in nature and is usually found in bodies of water (lakes, oceans and rivers) as well as domestic tap water, swimming pools, hot tubs, soil and air.

Many different species of scanthamoeba exist. Acanthamoeba organisms do not generally cause harm to humans (we come into contact with them when we wash, swim, drink water etc), but they can cause a serious eye disease if they infect the cornea. Not all species of acanthamoeba have been found to cause corneal infections. AK is most common in people who wear contact lenses, but anyone with a corneal injury is susceptible to developing the infection.

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