Colour Blindness Test

What is Colour Blindness?

Colour blindness, also commonly known as colour perception disorder, is a visual impairment characterised by a lack of ability to see or distinguish certain colours or shades. Colour blindness can occur at any age. However, it is usually recognised during childhood.

Colour blindness tests are methods used to assess how well a person can see colours. The tests use plates of different patterns and colours and ask the person to see the numbers or letters on the plates.

What are the screening tests used to detect colour blindness?

Colour blindness screening tests are quick and simple methods used to detect the presence of colour blindness. These tests do not provide a definitive diagnosis. However, they serve as a preliminary screening tool that may be necessary for a more comprehensive eye examination.

Some of the most common colour blindness screening tests are as follows:

• Ishihara Test
• Anomaloscopy Test
• Psuedoisochromatic Plates

However, the most widely used colour blindness screening test is the Ishihara test. The Ishihara test consists of plates containing clusters of circular dots. The dots are arranged in different colours and sizes.

People with normal colour vision can see the numbers or letters hidden on the number plates, whereas people with colour blindness may not see them or may see them differently.

What are Detailed Colour Blindness Tests?

While there are different types and degrees of colour blindness, several detailed tests are available to determine what type of colour blindness you have and how it may affect your daily life. The Farnsworth-Munsell 100 Shades test is used to assess your colour discrimination and ability to perceive shades of colour.

It contains four trays with small round discs with 100 different colours. The task is to build a colour palette by sorting the discs according to their hue. The test result provides detailed information about the type and degree of your colour vision.

The Farnsworth Flashlight test is used especially in areas where colour perception is critical, such as aviation and navigation. It is a device containing lights of different colour tones. The task is to test your colour perception ability by matching the colour shades of the lights. The test is highly sensitive in identifying mild or severe colour blindness.

The Cambridge test is a computer-based colour vision test. Circles of different colours and patterns are displayed on the screen. The test assesses colour blindness as well as other visual functions such as contrast perception and colour memory.

Anomaloscope tests are used to determine the type and degree of colour blindness. It uses a projection device and special glasses. It matches colours by adjusting the brightness of lights with different colour tones. Anomaloscope tests are one of the most detailed methods of diagnosing colour blindness.

Who Should Be Tested for Colour Blindness?

Colour blindness is a difficulty in perceiving colours, commonly known as red-green colour blindness. The condition is more common in men and affects about 1% of the population.

The following people should have a colour blindness test

• Those suspected of having colour blindness
• Workers in occupations where colour vision is critical, such as pilots, policemen, electricians and graphic design
• Children of school age
• People with certain eye conditions such as cataracts, diabetes and glaucoma

Colour Blindness Treatment

There are some methods of treating colour blindness that can help people with colour blindness to perceive colours better. Special glasses, such as ChromaGen, can help people with colour blindness to better distinguish colours.

In particular, these glasses work by changing the wavelength of light and making colours more distinct. Contact lenses specially designed for colour blindness are also available. These lenses also work by changing the wavelength of light and making colours more distinct.

How Much Does Colour Blindness Treatment Cost?

Colour blindness treatment price varies depending on the tests and operation to be performed. The treatment plan to be created by our specialist ophthalmologist depending on the detailed examination results may vary from person to person.

Please click here for appointment and price information .

The above information is for informational purposes. If you have any medical concerns or questions, please make an appointment with our ophthalmologists.