Can you go blind from acanthamoeba keratitis? How long does it take an opthomologist to know if you have acanthamoeba keratitis.

Yes, blindness can . Happen. Usually the diagnosis is clinical. Very difficult to identify these in the lab. Clinical symptoms include pain out of proportion to findings on exam, history of hard contact lens use and using tap water to clean. See an ophthalmologist to evaluate this.
Yes. Acanthamoebic keratitis (ak) is a serious corneal infection that can result in corneal blindness or total blindness. A high index of suspicion is generally necessary in establishing a prompt diagnosis and aggressive treatment. The general problem is corneal inflammation/infection not responding to typical treatment regimens, which prolongs the disease. Ak risk highest in soft ctls, homemade saline.