Hart W M, Hartz R K, Hagen R W, Clark K W
Invest Ophthalmol Vis Sci. 1984 Apr;25(4):400-13.
A method for color perimetry is proposed in which colored test objects are presented in a white surround, so that the luminance of the object and its surround are identical. The color of the test object then may be varied in its degree of saturation, while maintaining a constant luminance. A color video instrument controlled by a microcomputer is used as a tangent screen. Foveally viewed, colored test objects are adjusted initially in luminance by heterochromatic flicker photometry to match the luminance of a white background at 100 apostilb. The relative foveal scotoma for blue light requires that test objects large enough to include the perifoveal retina be used for flicker photometry of blue test objects. Due to the progressively increasing threshold for luminance contrast detection in extrafoveal retina, differences in luminance between the colored objects and the white surrounding, as the test objects are moved into the extrafoveal visual field, appear to remain subthreshold. Test object detection can thus be expected to be a perimetric measure of color contrast detection, relatively unaffected by luminance contrast detection. This strategy should simplify the use of colored objects for clinical perimetric testing and should provide a specific test of color vision in the extrafoveal visual field.
本文提出了一种颜色视野计检查法，即让彩色测试对象呈现在白色背景中，使测试对象及其背景的亮度相同。然后，测试对象的颜色饱和度可以变化，同时保持亮度不变。利用一台由微型计算机控制的彩色视频仪器作为切线屏。当从中央凹注视时，首先通过异色闪烁光度法调整彩色测试对象的亮度，使其与100阿熙提的白色背景亮度相匹配。由于蓝光相对中央凹暗点的存在，需要使用足够大以覆盖中央凹周围视网膜的测试对象来进行蓝色测试对象的闪烁光度测量。由于视网膜中央凹以外区域对亮度对比度检测的阈值逐渐增加，当测试对象移入中央凹以外的视野时，彩色对象与白色背景之间的亮度差异似乎仍低于阈值。因此，测试对象的检测有望成为一种颜色对比度检测的视野测量方法，相对不受亮度对比度检测的影响。这种方法应能简化彩色对象在临床视野检查中的应用，并能对中央凹以外视野的色觉进行特定测试。
