对手色系统的一种后天的颜色缺陷。

Investigative ophthalmology Pub Date : 1976-07-01
P E King-Smith, K Kranda, I C Wood
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引用次数: 0

摘要

对一名22岁男子的获得性单侧颜色缺陷进行了标准临床试验,并使用了被认为是专门测试亮度和对手色系统灵敏度的技术。在白色背景上使用1度200毫秒的测试闪光,有缺陷的左眼的光谱灵敏度在大约550纳米处有一个单一的宽峰。与光光度曲线相似;相比之下,在相同条件下测量的正态曲线在约440、520和600 nm处有三个峰。然而,受试者的光谱灵敏度曲线为检测20 Hz。闪烁很正常,与他的曲线相似。最近有人提出,200毫秒闪烁的正常曲线的三个峰反映了对手色系统的活动,而闪烁检测的单峰与亮度系统有关。因此,前面的观察结果可能被解释为受试者的对手色系统的特定损失,这将解释他的颜色辨别能力差。他的亮度系统似乎是正常的,并且有证据表明红色和绿色敏感(但不是蓝色敏感)的视锥细胞保持功能。受试者右眼的光谱敏感度接近正常,表明该缺陷起源于皮层前;然而,这只眼睛似乎有一些异常,表明相同缺陷的不太发达的形式。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
An acquired color defect of the opponent-color system.

An acquired unilateral color defect in a 22-year-old man has been investigated with standard clinical tests and by using techniques which, it is thought, test specifically for the sensitivity of the luminance and opponent-color systems. The spectral sensitivity of the defective left eye, using 1 degree 200 ms. test flashes on a white background, has a single broad peak at about 550 nm. and resembles the photopic luminosity curve; in contrast, the normal curve, measured in the same conditions, has three peaks at about 440, 520, and 600 nm. However, the subject's spectral sensitivity curve for detecting 20 Hz. flicker is quite normal and is similar to his curve for 200 ms. flashes. It has recently been proposed that the three peaks of the normal curve for 200 ms. flashes reflect the activity of the opponent-color system, whereas the single peak for flicker detection is related to the luminance system. The preceding observations may thus be interpreted in terms of a specific loss of the subject's opponent-color system and this would explain his poor color discrimination. His luminance system appears to be normal, and evidence is presented for the maintained function of red- and green-sensitive (but not blue-sensitive) cones. The spectral sensitivity of the subject's right eye is nearly normal, suggesting a precortical origin of the defect; however, there seems to be some abnormality in this eye, indicating a less developed form of the same defect.

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