Optokinetic nystagmus testing using personal computers.

Optokinetic nystagmus (OKN) testing is a useful tool for visual assessment. It has been used for assessing visual function in infants, hysterical patients, and malingerers. It is also of value in the diagnosis of disorders of the central nervous system. At present the devices used for the clinical testing of OKN are the OKN drum and OKN tape. A method is presented for OKN testing using an IBM-personal computer or compatible. This method is compared with the other two standard methods.