Acanthamoeba keratitis is it parasite that is found in the eye it's likes to breed and like see the cornea of the eye it is treated by eye drops and it can take time it will give you some things like photophobia so lots of light sensitivity there will be a pain involved you will require treatment through an opthamologist and you'll be seeing constantly and you will require lots of different drops.
AK is seen mostly with people that wear contacts but not always AK is not something to be done were contacts are worn with water no water activities. Always follow the strict hygiene and remember WATER=NO CONTACTS!