The parasitological and ophthalmological findings in an onchocerciasis survey in 8 villages (832 persons) and 5 primary schools (285 children) in Cameroon are reported. The use of the corneoscleral punch/microtiter plate quantitative skin snip technique greatly facilitated this study and its advantages over the weighed skin snip method are discussed. This simple technique could be used by paramedical personnel to detect the number of people in a community who have more than 15 microfiliariae in a snip near the eye. This is a measure of the intensity of infection and a good indicator of the number of people at risk of developing ocular pathology.