A Simple Test to Check How Good Your Eyes Are 

Just how good is your eyesight? Wanna check? Chances are you’re a tetrachromat! That's a person with increased color vision. Such people have more receptors in their eyes than the rest of the Earth’s population. They can see more shades of different colors. So, are you a superhuman? Let’s see!
This test has 4 levels: simple, regular, difficult, and mind-bending! if you reach level 4, get ready for some hard work - only 6% of people manage to get through!
Music by Epidemic Sound www.epidemicsound.com/
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