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目的:描述新的对比敏感度及色觉检查的原理及其临床应用。方法:对比敏感度用SLCT来评估。SLCT是由几行大小不变(20/25),但对比度逐渐降低的字母组成的对比敏感度表。色觉以锥细胞的对比敏感度来评估,这是一种视屏测试方法,每一个字母都代表三种视锥细胞中的一种类型(红、绿或蓝),对比度逐渐降低,分别确定分辨的阈值。测试对象分别为正常受试者以及有眼部疾病的患者。结果:SLCT在检查微小的离焦量以及早期眼部疾病方面比传统的检查具有更大的优势。锥细胞对比敏感度测试比传统的色觉检查敏感性高,不仅可以揭示遗传性色觉异常的类型及其严重程度,而且可以发现不同疾病造成的敏感度的下降。结论:这些新的方法拓展了视觉评估领域,揭示了人眼分辨力的微小变化,提示了遗传性、获得色觉异常眼病的类型和严重程度。
Objective: To describe the new contrast sensitivity and the principle of color vision examination and its clinical application. Method: Contrast sensitivity was assessed using SLCT. SLCT is composed of several lines of the same size (20/25), but the contrast is gradually reduced letters composed of contrast sensitivity table. Color perception is evaluated as the contrast sensitivity of cones, a visual test method in which each letter represents one of three types of cones (red, green or blue) and the contrast decreases gradually to determine the resolved Threshold. Test subjects were normal subjects and patients with eye diseases. Results: The SLCT has a greater advantage than the conventional examination in examining the small amount of defocus and early eye disease. Contrast sensitivity testing of cone cells is more sensitive than traditional color vision tests, revealing not only the type and severity of hereditary chromosomal abnormalities but also the reduction in susceptibility to different diseases. CONCLUSIONS: These new approaches have broadened the field of visual assessment, revealing small changes in the resolution of the human eye, suggesting hereditary and obtaining the type and severity of abnormal color vision disorders.