Seeing in our full range of colors is something a lot people might take for granted daily. A common alternative is a condition called color-blindness, the most common type being red-green color blindness. Color blindness occurs because the color photoreceptors in our eyes, known as cones, have a deficiency in responding to the proper wavelengths of light. Color blindness is therefore not actually a type of blindness, just a deficiency in perceiving color. In red-green color blindness, the affected individual has difficulty distinguishing between red and green, primarily, but color blindness often affects the whole visible color spectrum. This condition is an X-linked recessive disorder, which means that males are more easily affected by this than females. This is because males have one X chromosome and one Y chromosome, and therefore only need one recessive X chromosome from the mother to have this condition. This is different from females that need two copies of the recessive X chromosome, one from each parent. Multiple companies now sell glasses that can correct for the wearer's color blindness. This is the best fix we have currently, as there are no surgical procedures or drugs to take that can help curb the condition.
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