What is color blindness and how do color blind people see the world?

• It is an eye disease in which the person fails to distinguish between various color difference.
• They miss to see red, green and light blue.

Our eye is a gift to us from our mother nature. Made out of numerous complex system of neurons, it helps  us to see the colorful world around us. Although, we still can't to see a very wide region of electromagnetic spectrum, it is still very helpful for our daily needs.

So, how do we actually see a thing?
Common answer : when light of certain range of wavelengths, reflects from an objects and reaches our eye, it's image is formed on retina of the eye and we see that object. Well, it does not end there.
Part of light that reaches our eyes hits our retina. Our retina is itself made up of thousands of cones and rods. These cones and rods are the photo-receptors, that are responsible for the vision. They connect our eye to the optical nerves system with our brain. The cone part of the retina adjusts the color of the object and the rods are responsible for brightness. Also, Rods are used to see in very dim light and only show the world to us in black and white.

Due to some region the cones fails to respond some wavelength of visible light that makes the person unable to see the colors with those wavelengths. The reason is mainly genetics or it may be due to some eye injury. The person having this condition said to be suffering through color blindness. 

Then how do they see the world?

Let's take a test. Do you see two different colored apples down below?

• No! Congratulations. Your eye is healthy to see the beautiful colors.
• Yes! Oh! You are having color blindness.

so, in one say, the colorblind people fails to see some colors, not all. Their eyes just extract the colors and they see few colors only.

Want to check if you have a great eye? Take a test below.

Just say loudly, which number do you see in the following pictures?

Answer : 12

     

 Answer : 42

Answer : 74

Answer : 6

Answer : 2

Did you find all the numbers correct? Congratulations! You have a great eye.
Even if you find 3 or 4 of them correct, it's good. But, if you got only 0 or 1 or 2 correct, you either have colorblindness or you need to take serious care of your precious eyes.