Research question
What is red-green blindness?
One out of every twelve men perceives colors differently than the rest of the population. These men find it hard to distinguish particular colors that majority of people can recognize effortlessly. Additionally, these visual impairment victims have varied perception of saturation, brightness, and hue. The X chromosome carries a recessive sex-linked gene that causes offspring to inherit color vision impairment. According to Jenny and Kelso (2007), color vision impairment primarily affects the male gender. There are many types of color vision impairments—some occur due to physical injuries or degenerative diseases, and some are genetic. The red-green blindness is one of the most common forms of color vision impairment anomalies (Jenny & Kelso, 2007).
The red-green blindness affects approximately eight percent of all males in any population (Jenny & Kelso, 2007). The victims have trouble when it comes to differentiating colors found in the red-green section of the visible spectrum. Color vision is mainly associated with the cones that respond to any light that passes through the eye. Persons having a full-color vision can identify using L-cones, M-cones, and S-cones (Jenny & Kelso, 2007). Each of these three types of cones detects light from different sections of the visible spectrum. The people who cannot distinguish green and red suffer from dysfunction or a total lack of the M-cones and L-cones. Protanopia is the complete lack of the L-cones whereas deuteranopia is the complete lack of the M-cones. Protanopia and deuteranopia are a very rare form of color impairment. Only 0.4 percent of women are likely to have red-green blindness that makes them less vulnerable compared to men (Jenny & Kelso, 2007).
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The article is helpful because it focuses color vision impairment abnormalities and touches on red-green blindness. Firstly, the article explains how color vision impairment is transmitted from one person to another. Secondly, the article gives a few causes of color vision impairment and one example of color vision impairment. Secondly, the article gives an estimate of the population likely to be affected by red-green blindness in both men and women. Additionally, the article explains the causes of color vision impairment and red-green blindness. The article further explains the difference between a person with full-color vision and one with red-green blindness.
Search terms used: Color vision impairment, Red-green blindness
Reference
Jenny, B., & Kelso, N. V. (2007). Color design for the color vision impaired. Cartographic perspectives , (58), 61-67.
