Color blindness is the inability to perceive differences between certain colors. The colors the person has trouble seeing vary depending on the type of color blindness. Some have trouble distinguishing between red and green while others have trouble with yellow and blue. This deficiency can be genetic or it can be caused by trauma, nerve damage, or chemical exposure.

In this section we look at the different types of color blindness, answer commonly asked questions, and provide information about symptoms and tests for color blindness.

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