问题是，色觉障碍的程度为产品的可用性带来了巨大的挑战。
The question is to what extent color deficiency poses a problem for the usability of a product.
比如，通过红光或绿光表明系统状态，这会给红-绿色觉障碍者会带来麻烦。
For example, indicating a system status via virtual red and green lights, is a problem for people with red-green color deficiencies.
色觉障碍是由视锥细胞类型(cone type)的缺失或工作异常所导致。
Color deficiencies occur when a cone type is either missing or working abnormally.
色觉障碍是由视锥细胞类型(cone type)的缺失或工作异常所导致。
Color deficiencies occur when a cone type is either missing or working abnormally.
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