How Colour Vision Tests Work: A Comprehensive Overview

One of our most important senses is the ability to see. Our eyes help us navigate the world around us and play a vital role in our perception of colour. Colour vision tests are an excellent way to assess the ability of our eyes to perceive different colours accurately. This article will discuss everything you need to know about colour vision tests, what happens during the test, what the results mean, what to expect, and when to see an ophthalmologist.

What is a Colour Vision Test?

A colour vision test is a diagnostic tool used to assess an individual’s ability to distinguish and perceive different colours accurately. The test is usually conducted by an optometrist, ophthalmologist, or vision specialist. The test aims to identify any colour vision deficiencies or anomalies that may be present in an individual’s eyes.

Who Needs a Colour Vision Test?

A colour vision test is recommended for individuals with difficulty distinguishing colours or a family history of colour vision deficiencies. The test is also recommended for individuals who work in jobs that require accurate colour vision, such as pilots, electricians, and painters.

What Happens During the Test?

A colour vision test is a straightforward and non-invasive procedure. The test usually involves images or plates containing a series of coloured dots or shapes arranged in a specific pattern. The individual undergoing the test must identify the pattern or number hidden within the image.

The test may be administered in different ways, depending on the type of colour vision test being conducted. Some tests may require the individual to use one eye at a time, while others may require both eyes. The test may also be conducted under different lighting conditions, such as bright or dim lighting.

What Do the Results Mean?

A colour vision deficiency can be categorized into three types: protanopia (red-green colour blindness), deuteranopia (green-red colour blindness), and tritanopia (blue-yellow colour blindness). The severity of the deficiency can also vary from mild to severe.

What to Expect?

Before undergoing a colour vision test, it is essential to prepare adequately. It is recommended to avoid bright lights, glare, or any other visual stimuli that may affect your vision. It is also important to disclose any medical conditions or medications that may have an impact on your vision.

During the test, it is important to remain calm and focused. It is also essential to follow the instructions given by the optometrist or ophthalmologist administering the test. The test usually takes between 5-10 minutes, and the results are typically available immediately after the test.

Seeing an Ophthalmologist

If you have failed a colour vision test or have any concerns about your vision, it is recommended to see an ophthalmologist. An ophthalmologist is a medical doctor specializing in diagnosing and treating eye diseases and disorders.

The ophthalmologist will conduct a comprehensive eye exam and may request additional tests, such as a visual field test or a retinal exam, to further assess your vision. Based on the exam results, the ophthalmologist may recommend treatment options or refer you to a specialist if necessary.


Colour vision tests are an essential tool for assessing the ability of our eyes to perceive different colours accurately. The test is simple, non-invasive, and can provide valuable information about our vision. If you have any concerns about your colour vision or have failed a colour vision test, seeing an ophthalmologist for further evaluation is recommended. Remember, early detection and treatment of eye diseases and disorders can help prevent vision loss and improve your overall quality of life.

Are you looking for an ophthalmologist in Abbotsford? Look no further than Valley Laser Eye Centre. Our vision correction center in Abbotsford, BC, has state-of-the-art technology and a comfortable setting, ensuring a seamless experience. Our highly trained staff is dedicated to providing you with the best care possible. Don’t wait to improve your vision; book your consultation today!

DISCLAIMER: This blog post does not replace medical advice and should not be implemented prior to consulting a fully certified medical professional.



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