Color blindness

Congenital color vision disorder is usually called color blindness. It cannot distinguish between various colors or a certain color in the natural spectrum; those with poor ability to distinguish colors are said to have weak colors. Those who are weak in color can see the colors seen by normal people. However, the ability to recognize colors is slow or poor. When the light is dark, some are almost the same as color blindness or appear as color vision fatigue. It is generally not easy to strictly distinguish between color blindness, but only in different degrees. Congenital factors are more common in color blindness and color weakness.

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