Trachoma and onchocerciasis are still the two major tropical infections most dangerous to eyesight. According to the WHO, onchocerciasis affects more than a billion people worldwide. Africa bears almost the entire global burden of onchocerciasis, with 30 of the 37 endemic countries in the world and more than 99% of onchocerciasis and related blindness cases. This infection is spread through the bite of a black fly, living near lakes and rivers, which, if left untreated, leads to permanent blindness.
Trachoma, on the other hand, affects 2 million people. If left untreated, over time it causes scarring to the eyelid that pulls the eyelashes inward, so with every blink they scrape against the eye, which can lead to sight-loss.. It is children who are most affected by this disease, preventing them from receiving an education and severely handicapping them for the future.
In Burkina Faso, these diseases are still rife in some areas. Elimination of these diseases is necessary to avoid a large-scale expansion in the country.