Colour blindness and colour vision deficiency are more common than you think! About 8% of people find it hard to recognise and differentiate between colours. Therefore getting diagnosed as soon as possible is important to avoid the bad impact of the vision difficulties in everyday life. Including education, career opportunities, sports, cooking and even simple tasks like distinguishing between traffic lights. There are different types of tests that can help you determine whether you have or you don’t colour vision problems. In this article, we will explore five different diagnostic methods that are commonly used to identify colour vision deficiency.

Ishihara Plate Test

It is developed by a Japanese ophthalmologist, Dr. Shinobu Ishihara in 1917. Ishihara shows if you have a type of red-green colour vision problem. It doesn’t show blue-yellow colour blindness. The test consists of 38 plates. Every plate has a lot of dots in different sizes and hues. On the plates you can find symbols or numbers, either one or two digits. If you have a colour vision deficiency, it will be difficult to distinguish a symbol or number from its background. Maybe you won’t be able to make them out at all.

The Ishihara test's effectiveness lies in its ability to quickly and accurately diagnose colour vision deficiencies, enabling healthcare professionals to determine the type and severity of the condition. By identifying type of red-green colour vision problem, appropriate accommodations and interventions can be recommended, such as colour blindness glasses.

Farnsworth-Munsell 100 Hue Test

Another diagnostic method is the Farnsworth-Munsell 100 Hue Test. This is called ordering it shows the ability to arrange coloured blocks in a specific order based on hue. The blocks are arranged on a pegboard, and you must reorder them to create a smooth transition of colours. Colour blindness is detected when you have difficulty distinguishing between adjacent blocks of different hues. The test provides valuable information about the severity and red-green and blue-yellow colour vision deficiency. It is often used in sectors that require accurate colour vision,  like pilot or a graphic designer.

Nagel Anomaloscope Test

Anomaloscope is a valuable tool for diagnosing colour blindness. The device consists of two light sources: one that emits yellow light and another that emits a mixture of red and green light.  You will be asked to adjust the intensity of the red-green light until it matches the brightness of the yellow light. If you have a normal colour vision  you will make a precise match, while those with colour blindness may struggle to achieve an accurate balance between the lights.

Cambridge Colour Test

A newer method for diagnosing colour blindness is the colour arrangement test, also known as the Cambridge Colour Test. This test is similar to Ishihara Test but here you will use the computer or tablet screen instead of cards. You need to arrange coloured tiles in a particular order. It often includes various tasks, such as identifying numbers or patterns within colour arrangements. By analyzing the performance, the test can provide detailed information about the specific nature and severity of their colour blindness.

Colour blind Test Online

In addition to traditional clinical tests, several online colour blindness tests have gained popularity due to their accessibility and convenience. These tests use computer screens or mobile devices to present users with colour-based challenges.

Although online tests may not provide a definitive diagnosis like clinical tests, they can serve as a useful starting point for you suspecting colour vision deficiency. Online tests are free and fast solutions for receiving a feedback about your colour vision. Do you want to test your self? Try out our online tester and get your diagnosis less than 20 min.

These tests provide crucial information for individuals, helping them understand their colour blindness and enabling professionals to offer appropriate accommodations when necessary.

Do you want to know more about colour blindness and colour vision inhance glasses? Check out our technology by clicking here.

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