抄録
We evaluated optokinetic nystagmus quantitatively on the basis of pattern recognition and qualitatively by computerized procedure in the same patients.
The results of qualitative and quantitative tests agreed 85-72%, though with some variations according to the parameters examined. The total slow phase amplitude and the total slow phase velocity showed particularly high correlations.
About half of patients who were considered to have borderline findings in the qualitative test showed abnormal values in the quantitative test. In these patients, the final judgment of normal or abnormal must be made comprehensively according also to the results of other examinations.
The total slow phase amplitude and total slow phase velocity were reliable parameters for quantitative evaluation of nystagmus. These parameters were less liable to the effects of transient cessation, and showed high correlations between the results of qualitative and quantitative evaluations.
Most of the patients who showed abnormal values in none or only one of the parameters in quantitative evaluation were considered to be normal in qualitative evaluation, but most of those who showed abnormal values in 4 parameters quantitatively were considered to be abnormal qualitatively. The number of parameters showing abnormal values, as well as the values per se, are considered to be useful for evaluation of the test.
