Both of the contrast vision and contrastthreshold possess double function information of vision and contrast sensitivity, but a few functions of some eye diseases failed to respond in the same way.
对比视力和对比阈值都具有视力和对比敏感性的双功能信息，但在部分病眼功能的反映上不尽相同。
2
Object: to evaluate mesopic contrastthreshold under 3 kinds of background and to explore the effect of adaptation time, adaptation luminance and glare on contrastthresholdof humans eye.