Domenech B, Seguí M M, Capilla P, Illueca C
Departamento Interuniversitario de Optica, EU Optica, Alicante, Spain.
Ophthalmic Physiol Opt. 1994 Jul;14(3):302-5. doi: 10.1111/j.1475-1313.1994.tb00013.x.
The relationship between visual acuity (VA) and background colour is a question that still creates a certain amount of confusion even today, although most authors agree that colour background does not basically affect VA, or at best, values that are only slightly better are obtained with monochromatic yellow light. The object of this paper is to try to clarify if, when the axial chromatic aberration (ACA) has been compensated for, certain differences due exclusively to colour persist or not. In order for this, the VA-luminance functions with red, green, blue and white backgrounds have been measured for two emmetropic observers, before and after compensating for the ACA. The results show that after the compensation, the curve corresponding to red is above the one corresponding to blue, with the one corresponding to green in between. The achromatic function (white background) practically overlaps with the green one. This behaviour is consistent with that shown recently for contrast sensitivity functions (CSFs). However, the asymptotic values are identical for the three colours, and so, it is understandable that no significant differences are normally found when only a standard measurement of VA is taken using the typical illumination from an optotype projector.
视力（VA）与背景颜色之间的关系即使在今天仍是一个存在一定困惑的问题，尽管大多数作者都认为背景颜色基本上不会影响视力，或者充其量在使用单色黄光时能获得略好一点的值。本文的目的是试图弄清楚，当轴向色差（ACA）得到补偿后，是否仅因颜色而存在某些差异。为此，在补偿ACA之前和之后，测量了两名正视眼观察者在红色、绿色、蓝色和白色背景下的视力 - 亮度函数。结果表明，补偿后，红色对应的曲线高于蓝色对应的曲线，绿色对应的曲线介于两者之间。消色差函数（白色背景）实际上与绿色函数重叠。这种行为与最近对比度敏感度函数（CSF）所显示的一致。然而，三种颜色的渐近值是相同的，因此，当仅使用视标投影仪的典型照明进行标准视力测量时，通常没有发现显著差异就不足为奇了。
