Color Blindness

Color Blindness

Color blindness occurs when a single type of color-receptor cone is missing from the retina, due to a genetic defect, rendering the person unable to distinguish some colors from others. There are three main types of color blindness-green, red and rarely, blue. In this test card, both the fork and spade can be seen by people with normal color vision. The spade is purple, a color which is received by the receptors for blue-green in the retina. Since green-blind people have no green receptor cones they cannot distinguish the spade from the background. Similarly, red-blind people have no red-receptor cones and so fail to see the fork, which is red and should, therefore, stimulate the cones which receive red. Using a series of such cards, the nature of color blindness can be determined.

Category:

Howto & Style

Tags:

• Color
• Blindness

[karlawson]

I didnt see anything. rate if you didn't either.

[ejay201]

at the first it looks like a fork and a spoon but its a shovel and a fork thingy

[BooGSkiMSuRFSK8BiKE]

i cant see any ohh shit

[LittleMissSmokinHot]

I can't see either. :(

[azulestars123]

I only saw the spoon but not the fork.He said it was red but i couldnt see it.I pretty sure i can see all colors because no one has ever corrected me.Iike a stop light.I know when it turns red green or yellow so how come i been taking all this colorblind test an its telling me other wise?

[XxstickmanteamxX]

Is it a spatula

[ashietay22]

I thought it was a messed up 11! Fail!

[spacedreams2111]

lol we're all c/b haha

[MrJoGroove]

the spade is red?

[scorser]

I saw a vagina and pinkish clit.

[NotSoHotGuy002]

It's a conspiracy.