色觉障碍

色觉障碍是由视锥细胞类型（conetype）的缺失或工作异常所导致。

Color deficiencies occur when a cone type is either missing or working abnormally .

而这种情况更准确的说，应为色觉障碍（colordeficiencies），因为大多数情况下，人们并不是完全不能接收某种颜色，只是他们的感知会有所误差【3】。

It is more appropriate to call these conditions color deficiencies , because in the majority of cases people are not completely unable to perceive a certain color , but their perception is faulty [ 3 ] .

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 .

注视着自己的中心问题。视野缺损主要为中心暗点或旁中心暗点，色觉障碍严重。

The visual field defect was chiefly of central or pericentral scotoma ; and the color sensation was severely affected .

不要忘记，红色与蓝色对红-绿色觉障碍者可不是很友好（详见前文“色觉障碍”）。

Remember though that the combination of red and green is critical for people with red-green color deficiencies ( see color deficiency above ) .