After passing a colorblind test your result would be a strange medical name that most probably you never heard of that in your entire life. We can all agree that medical terms and names are complicated, often derived from Greek or Latin and we need some help to understand them well. In this article, you can easily understand everything about different types of color blindness.
The terminology of the "colorblind" word can be misleading. Most colorblind people can see many colors but not as broad as others. It is extremely rare to see in black and white.
How Color Blindness Works
The human eye sees color through wavelengths of light processed in the retina. Within the retina, photoreceptors called rods and cones are responsible for passing the information received from the wavelengths of light to the brain.
While rods are sensitive to the wavelengths of light responsible for night vision, cones are responsible for color vision.
In instances of normal color vision, this process would give the ability to see all colors by using the cones sensitive to the three red, green, or blue wavelengths of light at the right point of sensitivity.
Color blindness will occur when the cones fail to respond to the variations and points of sensitivity in wavelengths appropriately. When one or more of the cones cannot respond properly to send the right message to the brain, we are unable to see the colors correlated to those cones.
Normal color vision is known as trichromacy–tri because it uses all three types of cones correctly allowing us to see so many brilliant colors.
Usually, when people talk about color blindness, they are referring to the most common forms of red-green color blindness.
The most common form of colorblindness is known as red-green color blindness and is actually a grouping of a few disorders with similar effects on vision.1
Different Types of Color Blindness
There are seven official diagnoses of color blindness. Four different types of color blindness fall in the red-green category, and two different types of color blindness fall in the blue-yellow category.
1. Achromatopsia Total color blindness
2. Tritanopia – Individuals have no blue cones.
3. Tritanomaly – Individuals have blue cones and can usually see some shades of blue.
4. Protanopia – Individuals have no red cones.
5. Protanomaly – Individuals have red cones and can usually see some shades of red.
6. Deuteranopia – Individuals have no green cones.
7. Deuteranomaly – Individuals have green cones and can usually see some shades of green.
Monochromacy Color Blindness
Achromatopsia or total color blindness occurs in only one in every 33,000 people. People with monochromacy see no color at all. For these individuals, the world exists in black and white, much like an old-time television. The concomitant light sensitivity often transforms everyday tasks into difficult chores.
Blue-yellow Color Blindness
Blue-yellow color blindness is less common. The two types of color blindness in this category both make it difficult to tell the difference between blue and green and yellow and red. There are two types of blue-yellow color blindness:
2. Tritanopia (aka blue-blind) – Individuals have no blue cones.
with tritanopia are unable to perceive ‘blue’ light. 2
3. Tritanomaly (aka blue-weak) – Individuals have blue cones and they can usually see some shades of blue.
Red-green Color Blindness
People with both red and green deficiencies live in a world of murky greens where blues and yellows stand out.
Browns, oranges, shades of red, and green are easily confused.
Both types will confuse some blues with some purples and both types will struggle to identify pale shades of most colors.
The types of red-green color blindness fall into four different categories.
4. Protanopia (aka red-blind) – Individuals have no red cones.
People with protanopia are unable to perceive any ‘red’ light,
Protanopes are more likely to confuse:
Black with many shades of red
Dark brown with dark green, dark orange, and dark red
Some blues with some reds, purples, and dark pinks
Mid-greens with some oranges
5. Protanomaly (aka red-weak) – Individuals have red cones and can usually see some shades of red.
6. Deuteranopia (aka green-blind) – Individuals have no green cones, and they are unable to perceive ‘green’ light
Deuteranopes are more likely to confuse:-
Mid-reds with mid-greens
Blue-greens with grey and mid-pinks
Bright greens with yellows
Pale pinks with light grey
Mid-reds with mid-brown
Light blues with lilac
7. Deuteranomaly (aka green-weak) – Individuals have green cones and can usually see some shades of green.
The most common types of color blindness are those in the red-green category. 3
Are there currently any treatments for color-blindness?
There are no preventative treatments as it's genetic. However colored filters, spectacles, and contact lenses have been introduced that can alter someone's color perception. They might allow the wearer to see a few more colors or colors nearer to how a person with normal color vision would see them, but it doesn't really solve the issue. Color blindness affects so many aspects of our life. You can learn some tips & tricks at this online training course designed for colorblind people. Click on the links below:
A STEP-BY-STEP GUIDE FOR PARENTS/CHILDREN k-12 Click Here
TIPS & TRICKS FOR TIPS & TRICKS +12 Click Here