Onchocerciasis or river blindness is a skin disease and it causes eye disease and blindness. The illustration needed to show earlier signs, so careworkers in Africa could recognise and treat early before the onset of blindness. Onchocerciasis can be treated with an antiparasitic drug to kill the microfilariae that have infected the body. Eye issues are caused by the microfilariae migrating to the sclera of the eye, producing symptoms such as sclerosing keratitis or inflammation of the cornea and producing areas of opaque white spots.