An aetiological survey of a Cape Peninsula school for the deaf, in which 366 Cape Coloured and Asiatic children were examined, is reported. The relevant hereditary factors and the abnormal clinical findings are documented, and the more important of these are discussed. In 20% (74) of the children, the deafness was genetic; in 36% (132) it was acquired, and in 44% (160) it was cryptogenic.
Abducens Nerve Abnormalities, Multiple