Red Green Color Blindness Information
Red green color blindness
is often listed as the most common form of color blindness, right ahead of yellow blue color blindness. John Dalton, after whom Daltonism is named, wrote down the first recorded instance of this type of color blindness. Daltonism is just another term for color blindness, and John Dalton was one of the leading experts in this vastly under-studied field of ophthalmology. Being colorblind himself, John Dalton had a particular interest in the subject, and came up with a lot of the principles and theories that we still believe about red green color blindness
, as well as other forms, today.
Through a series of Vision Color Blindness tests, John Dalton was able to determine that he wasn't able to see orange, red, green, and yellow, or rather that all of these colors actually seemed to be the same color in his mind. All of the other colors in the spectrum appeared as various shades of blue, which eventually started shifting towards purple instead. He eventually determined that his eyes weren't able to process long light wavelengths, or specifically red light. These days, that condition is known as red green color blindness as well as the more official term protanopia. Dalton's eyes were donated to medical science when he passed away and preserved, and now we're able to determine that he actually suffered most likely from a slightly different form called deuteranopia.
As a matter of fact, red green color blindness is actually composed of four different types of Color Blindness, and each one has a slightly different effect on the impact of the wavelengths of light entering through The Retina.
The first type is called protanopia, which is a pure red blindness. The second form is known as protanomaly, which is simply a weakness in the ability to see red wavelengths. People with this condition can still see red; it's just not as bright as other colors. Deuteranopia is the third type and is a pure blindness for the green wavelength. Deuteranomaly, like protanomaly, is a general green weakness that makes green objects appear to be less bright or blended in with other hues.
Saying that red-green color blindness is the most common is not an exaggeration – it's estimated that at least 99% of people who are labeled as color blind have some sort of deficiency in their ability to process red or green light. Out of the 10% of males who are supposedly color blind, this means that 8% of them are red green color blind, and approximately 0.5% of the female population has it. This can manifest in a wide range of severity, depending on the individual case. Some people may have mild or moderate cases of red or Green Color Blindness , while other people may have an absolute case of blindness to these wavelengths. The way it's transmitted is typically from grandfather to grandson. Interesting, the mother usually acts as the dormant link between the two, not the father as you might think.
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Red Green Color Blindness to Color Blindness Test Charts