Colour Vision & Vision Deficiency 色盲/色弱辨色能力缺陷
Understanding Colour Vision & Vision Deficiency 深入了解色觉与色盲/色弱辨色能力缺陷
Core Clinical Aspects 色觉缺陷核心临床解析
Types of Colour Vision Deficiency 色觉缺陷的分类
Colour vision deficiency occurs in several distinct forms: Red-green colour blindness is most prevalent, including protanopia/protanomaly (missing/altered red cones) and deuteranopia/deuteranomaly (missing/altered green cones). Blue-yellow deficiency involves tritanopia/tritanomaly, while monochromacy (achromatopsia) is the rarest form, causing total loss of colour perception alongside photophobia and reduced acuity.
色觉缺陷可分为几种不同类型：红绿色盲/色弱最为常见，包括红色盲/红色弱（缺少或异常的红色锥状细胞）与绿色盲/绿色弱（缺少或异常的绿色锥状细胞）。蓝黄色盲/色弱涉及蓝色锥状细胞（Tritan 异常）。最罕见且严重的是全色盲（Monochromacy），患者世界完全呈灰色，并伴有畏光和视力下降。
Why Colour Vision Deficiency Happens 色觉缺陷的发病原因
It occurs when retinal cone cells are missing, non-functional, or possess altered spectral sensitivity curves. Most cases are inherited genetic mutations encoding photopigment proteins. Acquired loss can stem from ocular or systemic diseases (glaucoma, diabetic retinopathy, macular degeneration, optic neuritis), eye/brain trauma, toxic exposures, or long-term drug use (e.g., hydroxychloroquine).
当视网膜锥状细胞完全缺失、功能丧失或吸收光谱曲线发生改变时就会发生。绝大多数病例是由于编码色素蛋白的遗传基因突变所致。后天性色觉障碍则可由眼部或全身性疾病（青光眼、糖尿病视网膜病变、黄斑变性、视神经炎）、眼部或脑部外伤、毒性药物或化学物质暴露引起。
Who is More Prone to Problems 色觉缺陷的高发人群
Biological males are substantially more prone to red-green deficiencies because the encoding genes reside on the X chromosome. Males (XY) require only one mutated X to show symptoms, while females (XX) need both, making females frequent carriers. Individuals with a family history, older adults with retinal/lens aging, or patients with diabetes and multiple sclerosis are also more susceptible.
男性患红绿色觉缺陷的概率远高于女性，因为红绿色素基因位于 X 染色体上。男性（XY）只需一条异常 X 染色体即显性发病，而女性（XX）需两条均异常才会发病，故女性多为隐性携带者。有家族遗传史、视网膜/晶状体退化的年长者，或患有糖尿病、多发性硬化症的患者易感性更高。
Management & Correction Methods 管理与矫正改善方法
While inherited colour blindness cannot be permanently cured, non-surgical optical filters in specialty glasses or tinted contact lenses can block overlapping light wavelengths to boost contrast between hues for anomalous trichromats. Practical aids include real-time colour-identifying smartphone apps, high-contrast display modes, item labeling, and optimized ambient lighting.
虽然先天性色盲无法根治，但使用带有特定光学滤光片的技术眼镜或染色隐形眼镜，可通过阻断重叠的特定光波长来提高颜色对比度，辅助色弱者辨别相近色。实用方法还包括使用实时识别颜色的手机软件、开启高对比度显示设置、贴标签分类物品以及优化环境照明等。
Colour Blindness FAQ 色盲与色弱常见疑问解答
1. What is the main difference between being "colour blind" and "colour deficient" (colour weakness)? 问：“色盲”与“色弱”之间最核心的区别是什么？
Colour blindness typically refers to the total absence of one or more types of cone photopigments (dichromacy or monochromacy), meaning certain wavelengths cannot be perceived at all. Colour deficiency (or anomalous trichromacy/colour weakness) means all three cone types are present, but one functions with an altered spectral sensitivity curve. People with colour weakness can still see colors, but they struggle to distinguish subtle shades or overlapping hues under low light.
色盲通常指的是完全缺失某种类型或多种类型的锥状细胞色素（双色觉或单色觉），意味着完全无法接收某些波长的光线。而色弱（异常三色觉）则是指三种锥状细胞都在，但其中某种细胞的吸收光谱发生了偏移。色弱患者仍然能看到颜色，但在区分相近色系或在昏暗光线下辨色时会感到非常吃力。
2. Can special colour-blind glasses or tinted contact lenses completely cure colour blindness? 问：特殊的色盲矫正眼镜或色盲隐形眼镜能完全根治色盲吗？
No, optical filters cannot "cure" inherited genetic colour blindness or create new cone pigments. These lenses work by filtering out specific narrow wavelengths of light where red and green response curves overlap. By reducing this confusing overlap, they enhance visual contrast between colors, allowing anomalous trichromats to tell reds and greens apart more easily while wearing the lenses.
不能。光学滤光片无法“根治”基因遗传性色盲，也无法创造出缺失的锥状细胞。这类眼镜的工作原理是滤除红光与绿光重叠区域的特定窄波段光线。通过减少这种模糊混淆的重叠，眼镜增强了色彩之间的对比度，使色弱患者在佩戴时能更容易地区分红与绿。
3. Why are men far more likely to inherit red-green colour blindness than women? 问：为什么男性遗传红绿色盲/色弱的概率远高于女性？
The genes responsible for red and green cone photopigments are located on the X chromosome. Because biological males have only one X chromosome (XY), inheriting a single mutated X chromosome causes red-green colour deficiency. Females have two X chromosomes (XX), so if only one X is mutated, the healthy gene on the second X chromosome usually provides normal colour vision, making the female an asymptomatic carrier.
因为负责红绿锥状细胞色素的基因位于 X 染色体上。男性只有一条 X 染色体（XY），一旦继承了带突变的 X 染色体就会表现出红绿色觉障碍。而女性有两条 X 染色体（XX），即使其中一条携带突变基因，另一条健康的 X 染色体通常也能提供正常的色觉，因此女性大多只是无症状的隐性基因携带者。
4. How is colour vision deficiency officially tested and diagnosed during an eye checkup? 问：在眼科检查中，视光师是如何测试和诊断色觉缺陷的？
Optometrists use standardized screening tools, primarily Ishihara Pseudoisochromatic Plate Tests, where numbers or patterns formed by coloured dots must be identified against a contrasting background. For a more precise diagnostic breakdown, quantitative arrangement tests like the Farnsworth-Munsell 100 Hue Test or advanced Anomaloscopes are used to determine the exact type, severity, and spectral shift of the deficiency.
视光师会先使用标准筛选工具，最常见的是石原氏色盲检查图谱（Ishihara Test），要求受检者辨认由彩色圆点组成的数字或线条。如需更精准的定量诊断，可采用孟塞尔（Farnsworth-Munsell 100 Hue）色棋排序测试或色盲镜（Anomaloscope），精确测定缺陷的类型、严重程度及光谱偏移量。
5. Can someone suddenly develop colour blindness later in life if they were born with normal vision? 问：如果原本视力正常，人在后天成年后会突然患上色盲或色觉减退吗？
Yes. While inherited colour deficiency is present from birth, acquired colour vision loss can develop due to health conditions. Ocular diseases like glaucoma, macular degeneration, and optic neuritis, or systemic conditions like diabetes and multiple sclerosis can damage the retina or optic nerve. Additionally, head trauma or long-term usage of certain medications can cause sudden or progressive colour perception changes later in life.
会。虽然遗传性色觉缺陷是天生的，但后天性色觉减退可能会由于健康状况改变而发生。青光眼、黄斑变性、视神经炎等眼病，或者糖尿病、多发性硬化症等全身性疾病，都会损害视网膜或视神经。此外，头部外伤或长期服用特定药物也会导致后天突然或渐进性的色觉改变。
Aug 20,2026