The Tiny Soil Amoeba That Can Attack Eyes

Most of the time, this microscopic soil amoeba just eats bacteria. But if it accidentally enters your body, it turns into a dangerous parasite that can cause permanent blindness or fatal brain infections.

You can find these hardy organisms almost everywhere, from swimming pools to your own kitchen sink. While they usually live peacefully in the environment, they can transform into aggressive pathogens when they come into contact with human tissue. Because they possess a tough cyst stage that resists common cleaning chemicals, they are incredibly difficult to eradicate. It is a sobering reminder that some of the most persistent threats are invisible to the naked eye.