Correcting Color Blindness With Glasses

"In the retina, there are two types of cells that detect light," author David Turbert explains. "They are called rods and cones. Rods detect only light and dark and are very sensitive to low light levels. Cone cells detect color and are concentrated near the center of your vision. There are three types of cones that see color: red, green, and blue. The brain uses input from these cone cells to determine our color perception."
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Glasses that correct color blindness give Fargo man a bright new lease on life