The often called Ishihara plates were introduced by Dr. Shinobu Ishihara from Japan long time ago. Since then this test is the most well known all around the world.
This test consists of 38 different pseudoisochromatic plates. Each of them hides a number or line behind colorful dots. Based on what you can see and what not, it is possible to check if you are suffering from some form of red-green color blindness.
As the test is usually executed in a booklet, it is not the best possibility to online test your type and severity of color blindness. Other tests like the arrangement tests below show better results.
shihara 38 Plates CVD Test
The Ishihara Test is the most well known color blindness test all around the world. It consists of 38 so called pseudoisochromatic plates, each of them showing either a number or some lines. According to what you can see and what not, the test gives feedback of the degree of your red-green color vision deficiency.
This test can only be used to detect red-green color blindness.
How the test works:
For each plate you have to either enter the number or you have to choose the number of lines you can see. If you don't see anything just leave the input field empty.
This famous color vision test—which is based on 88 colored plates and not 100 as the name suggest—was introduced in 1943 by Farnsworth.
The test will show you four batches of 22 mixed colored plates. What you have to do is to arrange the for rows of plates in a correct order. That’s all.
All misplacements will be summed up to your personal total error score. The higher your TES is, the more severely colorblind you are. On the other hand you can also get some information on the type of your color vision deficiency based on the area around your biggest error points.
In 1947 Farnsworth released the D-15 dichotomous test. This is to this day one of the most famous color vision deficiency test and definitely the most famous color arrangement test.
You simply have to arrange the given colors in the correct order of colors. If you are suffering from some form of color blindness, you will arrange them quite differently compared to persons with normal color vision.
With this test is not only possible to check the type of your color vision deficiency but also its severity. Unfortunately the test results are not completely reliable, which is a base problem for all types of online color vision tests. But the result will be a good indicator of your correct color vision abilities, specially if you take it under different conditions.
This is my first try to develop a simple red-green color blindness test. It is based on the idea of the real anomaloscope, made from two different light sources which have to be brought to a match.
Just match the left color to the right one using the slider below the box. If you can match several of them you are definitely red-green colorblind. Originally I wanted to retrieve more detailed information from the test results. But it didn’t work out—yet.
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