Better known as the color blindness test, this test is the most used in medicine and ophthalmology to determine whether or not a person has color blindness. This phenomenon of visual perception is characterized by a color distortion, causing people who suffer from it to see reality in an altered way.
Do you want to know if you have color blindness? So, we recommend you take this test that we offer you at Psychology-Online. Don’t miss this fun Ishihara test online with the sheets and answers! In addition, we offer you all the information you need about what it measures and how to do the Ishihara test.
What does the Ishihara test measure?
As we have introduced previously, the Isihara test is used to find out whether or not a person has color blindness. To do this, the person is shown a series of pictures with different colors. If the person is able to pass the test, it means that he or she does not have color blindness.
The color blindness test has its origins in the 20th century, more specifically in 1917 when Shinobu Ishihara, a professor at the University of Tokyo, decided to publish some very curious slides with which he claimed he could diagnose a color blind person. Tests of this type can also be known as .
What is color blindness?
This phenomenon of visual perception has aroused much curiosity and is often confused with some type of blindness. However, this alteration is defined as the difficulty perceiving colors such as yellow, blue, red or green. There are various degrees of color blindness depending on the number of colors we can perceive, some color blind people may present achromatopsia (see black and white) although the most common diagnosis is deuteranopia (absence of the color green) and the protanopia (absence of red color)
Do you want to know how a colorblind person perceives the world? Take a look at the following image:
Example of the Ishihara test slide
This vision test consists of colored sheets in which you can see small circles of similar shades. Some of these small circles have a different color and form figures or numbers that can only be seen by people with normal visionTherefore, those people with color blindness will see the sheet with similar colors and will not appreciate the figure.
How to take the color blindness test
As Ishihara himself comments in his book published in 1960, to do this test the test slides must be presented in a room with good light or on a well-lit screen. Once the sheets are arranged, the person evaluated must say what they can see in them. Below we put some examples of sheets from this Ishihara test with the answers below each figure.
Online color blindness test: what number do you see?
While is true that the original Ishihara test It consists of 38 sheets, here we will do a small test so you can determine if you have color blindness:
- If on the sheet you see the number 29you don’t have any kind of problem.
- If you see 70you may have specific red color blindness.
- If you don’t see any numbers You need to go to a specialist, you probably have total color blindness.
What number can you see? Online color blindness test
Now, we present you another file. Remember to respond to the number you see in the image you have at the top of the screen.
- If you can see the number 15means that you do not have any vision problems.
- If you see the 17you may experience red color blindness.
- If you don’t see any numbersyou may have total color blindness, so you need to see a specialist.
Final test of the Ishihara test
One of the last sheets of this test can be a little confusing:
- If you only see figures without any meaning, it means that you have normal vision
- If you see the number 5 on the picture, it means you have color blindness.
Before finishing with this article about the online Ishihara test: slides and results, it is important to remember that, if you think you have color blindness and this test has raised doubts in you, it is important that you go to a specialist. They may be harmless, however, a correct diagnosis can help us prevent complications.
This article is merely informative, at Psychology-Online we do not have the power to make a diagnosis or recommend a treatment. We invite you to go to a psychologist to treat your particular case.
References
- Ishihara, S. (1960). Tests for color-blindness. Kanehara Shuppan Company.