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Display Colour Quality:
Confidence Goal:
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Test Instructions

How colour vision is tested:

This test measures your ability to see a pattern based on its colour. By testing with different colours we are able to understand which colours you may have difficulty seeing. When a person has colour blindness, they are able to see some colours better than others. Depending on on which colours are seen, the type and extent of colour vision deficiency can be estimated.

Test format:

You will see a series of images composed of dots with varying size and lightness. Look for a shape, such as a number or symbol, which is embedded within the dot pattern. Tap or click the button corresponding to which shape you see. On a computer the keyboard or number pad can also be used.

Should I guess?

Yes! If you think you can see a shape, but are still not 100% certain of your choice, it is better to take your best guess. If you are completely unsure or see nothing, then tap or click the button that says "Unsure" or Nothing". If using the keyboard you can also press "Enter" or "Space" to indicate the "Nothing" response.

What happens if I wear EnChroma glasses while taking this test?

The test is not designed to measure the change in colour perception caused by EnChroma glasses. In fact, depending on which glasses you are wearing, results could be worse, or could change in ways that are confusing. This test is intended only as a rapid assessment test to estimate the type and extent of colour vision deficiency - it does not measure colour vision aptitude or fine colour discrimination.

Can the test be used for a child?

Sure! We recommend the following Test Options for testing with children:

I got different results on a different device, why?

Results may vary depending on the quality of screen on your device. If you have a computer that is older or has a low quality of colour rendering, you should change the Display Colour Quality to Low in the Test Options. If you have a calibrated 100% gamut area screen, select "Best".

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NOTICE

While taking this test, please DO NOT wear any type of filtering eyewear or tinted lenses.

The EnChroma Cx lenses are not designed to defeat colour blindness screening tests and are not certified to improve your score on this test.

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NOTICE

Sorry, a problem was detected in the responses provided.

Please read the instructions and try again. If you get this error again, you may have a colour deficiency that is too strong to be measured using this app.

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ERROR

Sorry, an internal error condition was detected.

Please try the test again. If you get this error again, you may have a colour deficiency that is too strong to be measured using this app.

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Colour Blindness

What is Colour Blindness?

Colour blindness (also called colour vision deficiency or CVD) is a reduced ability to see colours.

Someone who is colour blind is technically not "blind" to colours, but may misidentify, confuse, fail to notice or notice colours less quickly than normal.

About 1 in 12 male and 1 in 200 females worldwide have congenital red-green colour vision deficiency (CVD). An estimated 3-4% of the population has acquired blue-yellow CVD associated with an age-related low-vision disorder.

Protans have a red-green colour vision deficiency caused by an anomaly in the red-sensitive retinal cone cells. Protans typically confuse between orange versus green, red versus black, blue versus purple, and light red (or "salmon") versus gray.

Deutans have a red-green colour vision deficiency caused by an anomaly in the green-sensitive retinal cone cells. Deutans typically confuse shades of yellow versus green, green versus gray and magenta (or "pink") versus gray.

Tritans have a blue-yellow colour vision deficiency caused by an anomaly of the blue-sensitive retinal cone cells. Tritans typically confuse shades of yellow versus gray and blue versus gray.

CVD is classified by type (protan, deutan or tritan) as well as the extent which can be mild, moderate or strong.

This test is not a medical diagnosis and has not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease. Results may vary depending on the colour accuracy of your display. Please consult your eye care professional for more information about colour vision deficiency.

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About Test

The EnChroma® Colour Blindness Test is a self-assessment tool to measure type and extent of colour vision deficiency. This test is for informational purposes only. If you believe you may have a colour vision deficiency please consult an eye care professional.

Results may vary depending on many factors including the type and quality of your device display, and operating system configuration. Before starting the test, turn off any software that may alter the screen colour. Blue light filtering software (such as Night Shift and f.lux) may cause the test to return a "tritan" classification.

Taking this test with coloured glasses including "colour blind glasses" may cause the test to return an erroneous classification. To ensure accuracy of the result, remove any filtering eyewear or lenses.

The EnChroma® Colour Blindness Test was created by EnChroma, Inc. of Berkeley, CA.

EnChroma envisions a world where the colour blind have equal access to the experience of colour, enabling opportunities, connections, and exploration.

Learn more at enchroma.co.uk.

Copyright 2015-2020 EnChroma, Inc. All rights reserved. Unauthorized use and copying will be prosecuted to the fullest extent of the law.

EnChroma is a registered trademark of EnChroma, Inc.

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Sorry

Sorry, the email report could not be sent.

Make sure your device is connected to the network or try again later.

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Internal Error

Sorry, the EnChroma Colour Blindness Test detected an internal error. The test is presently unable to operate on your device.

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Pre-Test Question #1

What does the "GREEN LIGHT" of a typical traffic signal look like to you?
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Pre-Test Question #2

How often do you confuse the colours BLUE and PURPLE?
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Pre-Test Question #3

Do RED colours sometimes seem darker to you, compared to what other people seem to see?
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Pre-Test Question #4

What colour does PEANUT BUTTER look like to you?
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Pre-Test Question #5

What is your age?
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Pre-Test Question #6

How often do you wear SUNGLASSES?
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Pre-Test Question #7

How good is the quality of colour on the DISPLAY you are currently viewing?
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Pre-Test Question #8

What is your visual acuity?
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