Ishihara Test for Color Blindness

 

What numbers do you see revealed in the patterns of dots below?

Normal Color Vision

Red-Green Color Blind

 

Left

Right

 

Left

Right

Top

25

29

Top

25

Spots

Middle

45

56

Middle

Spots

56

Bottom

6

8

Bottom

Spots

Spots

Another interesting color blindness test is below

The test to the left is simpler.
The individual with normal color vision will see a 5 revealed in the dot pattern.
An individual with Red/Green (the most common) color blindness will see a 2 revealed in the dots.