Trials of a computer-controlled colour vision test that preserves the advantages of pseudoisochromatic plates
Trials of a computer-controlled colour vision test that preserves the advantages of pseudoisochromatic plates
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保留伪等色板优点的计算机控制色觉测试试验
DOI：
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发表时间：
1991
期刊：
影响因子：
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通讯作者：
J. Mollon
中科院分区：
文献类型：
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作者：
Jeremy Reffin;S. Astell;J. Mollon
在过去的十年中，计算机控制的光栅显示器已被广泛用于识别先天性和后天性色觉缺陷。在此类测试中，通常要求受试者检测目标点或光栅，并且目标的色度沿着颜色空间的不同轴进行调制。这种测试的主要优点是可以根据患者的表现动态和定量地调整色度调制的深度。主要缺点在于难以确保患者不会通过边缘伪影或通过目标和场之间的亮度差异来检测目标。为了消除这些困难，我们从原始伪等色板的设计者那里借用了两种策略：第一，目标由离散的斑块形成，每个斑块都有自己的轮廓，第二，斑块的亮度随机变化而不是相等。对于一组受试者，将新测试的表现与内格尔异常镜、石原板和法恩斯托-孟塞尔100色调测试的表现进行了比较。该测试是快速管理，它分离的protan和deutan类型具有高可靠性，它给出了一个定量的措施，颜色的歧视。然而，我们提请注意第三种策略，它体现在石原的一些板块中，这一原则可以用于本测试的修改版本。
During the last decade, computer-controlled raster displays have been widely used to identify congenital and acquired deficits of colour vision. In such tests, the subject is commonly asked to detect a target spot or a grating, and the chromaticity of the target is modulated along varying axes of colour space. The chief advantage of such tests is that the depth of chromatic modulation can be dynamically and quantitatively adjusted according to the patient’s performance. The chief disadvantage lies in the difficulty of ensuring that the patient does not detect the target by edge artefacts or by differences in luminosity between target and field. To eliminate these difficulties, we have borrowed two ploys from the designers of the original pseudoisochromatic plates: first, the target is formed from discrete patches, each having its own contour, and second, the luminances of the patches are varied randomly rather than being equated. For a group of subjects, performance on the new test has been compared with performance on the Nagel anomaloscope, the Ishihara plates, and the Farnsworth-Munsell 100-hue test. The test is rapid to administer, it separates protan and deutan types with high reliability, and it gives a quantitative measure of colour discrimination. However, we draw attention to a third ploy that is embodied in some of the Ishihara plates, and this principle could be used in a modified version of the present test.