Color Blindness

By: Anna Reyes

What is Color-Blindness?

Color-blindness is the inability to distinguish the differences between certain colors. This condition results from an absence of color-sensitive pigment in the cone cells of the retina, the nerve layer at the back of the eye.

Normal Color Vision

Normal color vision is also known as Trichromacy. Trichromacy is when the eye uses all three types of light cones correctly. The way trichromats see is when different nerve cells in the retina react to the three types of light cones which are red, blue, and green. The three types of light cones are all you need to be able to distinguish color because once they come together they make up all the other colors.

Different Types of Color Blindness

There are three main types of color blindness

Type of Inheritance

Color Blindness is a recessive trait and it is sex linked. X Chromosome mutations and mutations in the OPNILW, OPNIMW, and OPNISW genes cause the forms of color vision deficiency.
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Who does color blindness affect?

More males are likely to inherit color blindness than females because the gene that is responsible for the inheritance of it are on the X Chromosomes. Males only have one X Chromosome while Females have two X Chromosomes. A functional gene on one of the X Chromosomes is enough to be able to make up for the lose of the other X Chromosome while since males only carry one X Chromosome they're more likely to inherit Color Blindness.

How is Color Blindness detected?

Eye care professionals detect color blindness through a variety of tests to be able to diagnose the patient with color blindness. The most common test for Color Blindness is the Ishihara Color Vision Test.

Is there Treatment?

No there is no way to be able to treat color blindness. Inherited color blindness can be present at birth, begin in childhood, or not appear until adulthood and no matter when diagnosed, patients that suffer with color blindness learn to live with their genetic disorder.