It then may progress to acute conjunctivitis and possibly blindness; however, this also may be the first indication of the disease.

Weeks observed that acute conjunctivitis had been observed in Egypt, France, and England.

Bubbles formed and burst on nose and mouth cavities, eye sockets pouring watery filth like acute conjunctivitis, that wheezing now a liquid sound.

Bengtson, while studying H. aegyptius in Georgia, reported that the majority of cases of acute conjunctivitis occurred during the breeding season of the eye gnat, Hippelates pusio.