Kedzia B, Niworowski M
Zakładu Optometrii AM, Poznaniu.
Klin Oczna. 1992;94(2-3):71-5.
The authors present the thesis that in apperception of the Foucault's test in condition of a threshold contrast only the first harmonic component is decisive; in connection with this one can replace the sinusoidal tests applied for the demarcation of the sensitivity curve of the visual system to contrast by Foucault's test. They point to the eventual possibility--if the influence of the following components would prove to be essential--of using the Foucault's test together with the sinusoidal test in order to make the diagnosis of pathological conditions more selective. The CSF function was designated by means of the sinusoidal and Foucault's tests seen on a monitor screen using the methods of contrast increase. In 8 subjects observing simultaneously one discovered that for the frequencies larger or equal to 1.5 stop-1 one can apply the Foucault's test instead of the sinusoidal test. Below the space frequency of 1.5 stop-1 one observed differences between the values of sensitivity to contrast demarcated by means of both tests; these differences result probably from the influence of the higher harmonics of the Foucault's test on the apperception of the test.
在阈值对比度条件下对傅科测试的感知中，只有一次谐波分量起决定性作用；据此，可以用傅科测试取代用于划定视觉系统对对比度敏感度曲线的正弦测试。他们指出，如果后续分量的影响被证明至关重要，最终有可能将傅科测试与正弦测试一起使用，以便更有针对性地诊断病理状况。通过在监视器屏幕上使用对比度增加的方法，借助正弦测试和傅科测试来测定对比敏感度函数（CSF）。在8名同时进行观察的受试者中，发现对于频率大于或等于1.5周/度的情况，可以使用傅科测试而非正弦测试。在空间频率低于1.5周/度时，观察到通过两种测试划定的对比度敏感度值存在差异；这些差异可能是由于傅科测试的高次谐波对测试感知的影响所致。
