Chlamydia Trachomatis, or trachoma, is a disease of the eye that can be transmitted by the common house fly. Generally the disease is only found in poorer areas of the world, due to the lack of hygiene. Trachoma causes conjunctiva, or pink-eye, and after repeated infections causes blindness. After several infections the eyelid becomes distorted and the eyelash begins to rub the cornea causing scarring and blindness. The disease can be prevented by face-washing and avoiding contact with eye-fluids or nasal-fluids of an infected person.