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Color vision is the capacity to distinguish objects based on the wavelengths of light they reflect or emit, and color vision is one of the most salient features used to describe objects in our environment. Consider a few things that exquisite color discrimination enables—being able to determine the ripeness of fruit, to rapidly detect your car in a parking lot, or to determine if your steak is cooked to your liking. Each individual's perception of color is a private sensation and, for those individuals who possess a “normal” ability to perceive color, this sense is often taken for granted. Conversely, individuals with color deficiency are often aware of their defective color discrimination throughout daily life. For example, people with color vision deficiencies can have difficulty ...

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