An idea for the Ishihara tests was by the Japanese ophthalmologist Shinobu Ishihara in 1917 to check red-green color vision deficiency. The test includes Ishihara plates containing colored dots forming a random digit.

The patterns formed within the plates are easily visible to most people. However, those affected by color blindness fail to detect such numbers. Thus, the test helps people to check for color blindness and to generate accurate results along with the severity of the condition.

The traditional Ishihara test comprises 36 colored plates, leading to precise results, making it one of the best color-blind tests available.

 Ishihara test

How to take the test?

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Take a Test

Go to colorblindtest.net with any browser, then navigate to Ishihara test and click the "take the test" button to start the test.


Identify Numbers & Figures

During the test, identify the digits within the plates of dots and record your answers.


Review Results

After taking the test, you will receive a result indicating your color vision status, type, and severity of color blindness.

Types of plates in the Ishihara test

Demonstration Plates -

These plates refer to the first plates visible during the test. The first plate of the test is visible to all people, irrespective of color blindness. The demonstration plate does not add to the score and is a practice plate to introduce you to the test.

Transformation plates -

These plates help distinguish between people with normal vision and those affected by color blindness. Transformation plates are non visible to color-blind users. Thus, such plates help to sort people suffering from color vision deficiency.

Vanishing plates -

The figures or numbers visible on the Vanishing plate cannot be seen by people affected by color blindness. Thus, if you can observe the digits hidden in the vanishing plate, you do not suffer from such a condition.

Hidden digit plates -

Such plates are special plates provided in this test, which allows users with color blindness to locate the digits or figures hidden beneath the plates. A user with normal color vision cannot detect such elements in the hidden digit plate.

Diagnostic plates -

As the name suggests, such plates help study the severity and the type of color blindness, such as Deuteranopia or Protanomaly. Users affected by color blindness can be studied, and measures can be taken to improve their experience.

Benefits of Online Ishihara Test


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Frequently Asked Questions

What is a 21-plate Ishihara test?

Unlike the traditional Ishihara test with 36 plates, the 21-plate test is a quicker and more efficient way to discover color blindness. However, it is less accurate than the former 36 plates test.

Are all Ishihara Plates the same?

No, there are different types of plates, such as demonstrating or vanishing, which fulfills different needs or requirements of the user.

What If I Fail The Color Blind Test?

If you fail the test, it implies that you are affected by color blindness. If you are unsure, you can try retaking the test, as it is free to use.

Is the Color Vision Test Suitable For All Ages?

Yes, the test is reliable for people of all ages. Therefore, you can test for color blindness with no limitations on age. The test is available online and does not require downloading any application or software.