Iijima H, Satoh S
Department of Ophthalmology, Yamanashi Medical College, Tamaho, Japan.
Jpn J Ophthalmol. 1988;32(4):412-22.
A new apparatus was developed for mapping the extrafoveal color vision, the perimetric color vision analyzer. A yellow test object with varying degrees of saturation is presented on a cathode ray tube color display in a random sequence at one of 10 points around the fixation spot. The background is a mosaic pattern consisting of gray spots of the same size and shape as the test object, with various luminances. Background patterns with or without a test object are presented alternately. The subject is instructed to press a key when he detects a yellow object in the background pattern. The luminance of the test object is in the same range as the background gray spots. Since the luminance of background spots is changed synchronously at random when the test object appears, the subject can detect the test object only by the difference in color saturation. The results show the color contrast sensitivity at every designated point in the central visual field. The clinical application of the perimetric color vision analyzer revealed extrafoveal color defects which could not be evaluated with conventional color vision tests. It also showed that in some chorioretinal and optic nerve disorders the topographic pattern of color contrast sensitivity disagrees with that of luminance contrast sensitivity measured with automated static perimetry.
一种用于测绘中心凹外色觉的新仪器——周边视野色觉分析仪被研发出来。一个具有不同饱和度的黄色测试物体以随机序列呈现在阴极射线管彩色显示器上，位于注视点周围10个点中的某一点。背景是由与测试物体大小和形状相同、具有不同亮度的灰色斑点组成的镶嵌图案。有或没有测试物体的背景图案交替呈现。当受试者在背景图案中检测到黄色物体时，需按下一个按键。测试物体的亮度与背景灰色斑点处于相同范围。由于当测试物体出现时，背景斑点的亮度会随机同步变化，受试者只能通过颜色饱和度的差异来检测测试物体。结果显示了中央视野中每个指定点的颜色对比敏感度。周边视野色觉分析仪的临床应用揭示了一些用传统色觉测试无法评估的中心凹外颜色缺陷。它还表明，在一些脉络膜视网膜和视神经疾病中，颜色对比敏感度的地形图模式与用自动静态视野计测量的亮度对比敏感度的地形图模式不一致。
