Chapter 2: Classification
Most people think that a color blindness person
cannot see colors at all or see the world in black and white hues and shades of
grey, which is correct, but this is just one type of color blindness and it is
called monochromacy or ‘totally’ color blind but it is very
rare. There is three other types of color blindness as I mentioned in chapter 1 and each type can be classified based on partial or complete loss of function of one or more of the different cone systems.
The types of Color Blindness (Color Vision Deficiency) :
1. Red-Green color blindness:
There is to types of Red-Green color blindness the first one and the most
common type and what is known as "deuteranomaly".
This type is affected 6% of males and 0.01% of females. Having a mutated form
of the long-wavelength (red) pigment, whose peak sensitivity is at a shorter
wavelength than in the normal retina. This means that they are less able to
discriminate colors, and they do not see mixed lights as having the same colors
as normal observers.
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Deuteranomaly |
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| Normal Vision |
The second type affected only 1% of males and rare in
females which is the Protanopia.
Having a mutated form of the long-wavelength (red) pigment, whose peak
sensitivity is at a shorter wavelength than in the normal retina.
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| Normal Vision |
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| Protanopia |
2. Blue-Yellow color blindness:
This type is affecting 1% of males which called Tritanopes. Having a mutated form of
the short-wavelength (blue) pigment. The short-wavelength pigment is shifted
towards the green area of the spectrum.
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| Normal Vision |
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| Tritanopes |
3. Total Color Blindness:
According
to the Colour Blind Awareness organization this type of Color Vision Deficiency is extremely rare and
only in approximately 1 person in 33,000. people with total color blindness can not see the colors at all and all the see is different shades of gray ranging from white to black due to failure of two or the three cone cell photopigments.
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| Normal Vision |
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| Total Colorblind |
This is a really awesome first blog. I love the pictures, they really get across what it is like for someone that is colorblind. I did not even know that much about colorblindness until I had a roommate that was affected. The last comparison you uploaded is really unreal, I can not even fathom how someone has no perception of color at all. Truly unbelievable.
ReplyDeleteI love the pictures so much. It makes more sense to me when I look at the pictures. I did not know there are different types of colorblindness.
ReplyDeleteLooking forward to see your next blog and learn more about colorblindness.