Online Colour blindness Test Free: Top 5 Websites

There are lots of websites claiming for online color blindness test but here are the top 5 websites that you must refer to for accurate results : 

• Eyeque.com

• Enchroma.com

• Colorlitelens.com

• Coolwinks.com

• Onlinecolorblindtest.com

1. EyeQue

Features:

• Interactive Interface.

• Easy to use.

• Email Guidance.

• Chat Support.

• Our Rating - 4.5/5.

Take Online Color Vision Test: Click Here

2. EnChroma

Features:

• Interactive Interface.

• Easy to use.

• Email Guidance.

• Chat Support.

• Our Rating - 4/5

Take Online Color Vision Test: Click Here

3. CoolWinks

Features:

• Interactive Interface.

• Easy to use.

• Our Rating - 3.5/5

Take Online Color Vision Test: Click Here

4. ColorLiteLens

Features:

• All Types of Color Blind Test Available.

• Easy to use.

• Our Rating - 3.5/5

• Take Red Green Color Blind Test: Click Here

• Take Blue Color Blind Test: Click Here

• Take the Ishihara Color Blind Test: Click Here

5. OnlineColorBlindTest

Features:

• All Types of Color Blind Test Available.

• Easy to use.

• Our Rating - 2.5/5

Take the Ishihara Color Blind Test: Click Here

Most people who are color blind don't even realize that they have some form of color deficiency and that's because they can still see colors. People with color blindness do not see the world in perfect black and white instead they see things more kind of a yellow or brown hue and part of that because there are many different types of colorblindness.

 Did you know?

Every 1 out of 12 men are colorblind and that 1 out of every 200 women have some form of color deficiency.

Causes of color blindness

1. Most of the time color blindness is inherited genetically.

2. Colour blindness that results from some toxicities.

3. Some eye diseases can cause color vision deficiency or color blindness.

 

Probabilities for transfer of color blindness from parents

Studies found that genetics for color blindness is carried on the X-chromosome alone.

Case 1: Father is not color blind, Mother is a carrier

If somebody's father isn't color blind but their mother is a carrier for the gene then there's a 50% chance that her son would be colorblind. 

And then there's a 50% chance that her daughter would become a carrier as well but because it is a recessive gene the daughter will only be a carrier and won't necessarily be colour blind.

Case 2: Father is color blind, Mother is a carrier

If a woman who is a carrier has a child with a man who is color blind there's again a 50% chance that their sons could become colorblind.

And 100% chance that their daughter will at least be a carrier of the gene and a 50% chance that their daughter could be colorblind as well.

Case 3: Father is not color blind, Mother is color blind

If a woman is color blind and she has a family with a man who is not colorblind all her sons would be colorblind and that's because she's only passing on colorblind X chromosomes.

And then her daughter would be guaranteed to be a least a carrier.

Case 4: Father is color blind, Mother is color blind

If a color-blind woman has children with a colorblind man then all of their children would be color blind.

Most of the time colorblindness is passed down through genetics these individuals will have some form of a red-green color deficiency however they usually still can see red and green need to see things as different hues of red and greens compared to somebody who doesn't have color blindness.

 

How Colour Vision Works? What is Trichromacy/Trichromatic Vision?

Color vision works within the eye because your retina has different cones that perceive the different wavelengths of light. These cones are:

1. S-cones. 

2. M-cones.

3. L-cones. 

S-cones which stand for short-wavelength cones and that pertains to different short wavelengths of light such as blue light.

M cones for a medium range of wavelength of cones these are usually in the green color ranges.

L cones for long wavelengths of light which are more of the red colors of the light spectrum.

The person who has all three of these cones functioning well within the retina is known to have trichromacy or what is called trichromatic vision.

Trichromatic Vision

Types of Color Blindness

Anomalous trichromacy

The most common type of color blindnessis called anomalous trichromacy and that's where one of these cones in the retina is not functioning as well as the rest of the two cones,.

1. Protanomaly(Red Color Deficiency)

Red Colour Deficiency

When the L cone is impaired and not functioning properly then this is called protanomaly. In protanomaly, the sensitivity line shifts toward the M cone leaving the difference between the two cones to be very small and hard to tell the difference between the two colors meaning the person having such type of color vision deficiency has trouble seeing red and sees things more as green yellow and Browns.

2. Deuteranomaly (Green Color Deficiency)

Green Colour Deficiency

A person with the M cone Shifting toward the L cones the longer red wavelengths have Deuter anomaly and will see redder normally and have difficulty seeing the green colors.

3. Tritananomaly (Blue-Yellow Color Deficiency)

Blue-Yellow Color Deficiency

In this the S-cone is shifted toward the green and read these people have trouble with blue and yellow colors but it is rare and almost always acquired in some type of eye disease.