If all you see are three circles filled with dots of the same color, you are normal. If you see something different (such as different colored letters inside each circle) – immediately contact me in the comment section below.
You may be a tetrachromat: very rare and super human.
You might be one.
In simple terms, here’s how normal color vision works:
We all have three types of color photoreceptive cells in the back of our eyes (the retina) – which are often called the red, green, and blue “cones.” We are trichromats. Each of these ‘flavors’ of cone is sensitive to a particular range of colors of the spectrum. And usually when we perceive a color, it is the result of a combination of signals from more than one flavor of cone. For example, seeing “orange” is the result of a moderate signal from a green cone and a stronger signal from a red cone. And we are able to distinguish the range of orange hues from each other by the different strengths of green and red cone signals that each orange hue generates (darker orange would have a stronger red signal, etc).
What would happen if you had a fourth cone, an extra color photoreceptor?
If you are a tetrachromat, the most likely scenario is that you have a mutant form of the red cone while also having normal form of the red cone – two types of red cones that are sensitive to slightly different ranges of the red end of the color spectrum. You would not be able to see extra colors the rest of us can’t (sadly, no ultraviolet vision, etc.), but you would be able to make distinctions between very similar colors that the rest of us cannot. Two samples that would look like the same color of red to me would look like dramatically different reds to a tetrachromat.
The most likely candidate for being a tetrachromat:
â€¢ You are a woman
â€¢Â You have men with red/green colorblindness in your family.
â€¢ In particular, you have a son or father with red/green colorblindness.
If you can see more than colored circles in the three tests above, drop me a line in the comment section below.