What is colour blindness? When people hear colour blindness, they often think it means the colour blind person sees only in black and white. In truth, they face colour vision problems. And experience a colour deficiency or confusion between colours.
For example, some people can’t tell the difference between gray and green. This misconception is due to the lack of education on the awareness of colour blindness. Colour deficiency is a condition. Some people have challenges to see one or more primary colours (red, green, or blue). and being able to recognize them through their retina (back of the eye).
Common type of colour blindness lack green receptors, red receptors and blue receptors. It results in the person seeing only 1 colour. Some people have no functioning cones on the back of the eye and this causes them to see only gray, black or white.
Colour blindness can affect one’s ability to choose cloth colors, draw, label and more. When children are colour blind, it can sometimes be mistaken for cognitive problems. Such as unable to learn the colours. It can also interfere with their ability to recognize coloured shapes.
Was I born colour blind?
People inherit colour blindness through their mother. While women are often not colour blind, if the mother’s father is colour blind the son will be colour blind. Yet, if the child’s father is colour blind, and the mother’s father is not, the child will not be colour blind.
Fascinating enough, colour blindness or colour deficiency usually affects males1. It is cause by a deficiency of certain chemicals in the retina of the eye.
1 Harrison, G.A.; Tanner, J.M.; Pilbeam, D.R.; Baker, P.T. (1988). Human Biology. Oxford: Oxford University Press. pp. 183–187, 287–290
What is a colour blindness test?
The Colorist System includes a variety of tests to determine the type of colour blindness:
Color Vision Examination
Apart from the colour vision screening, we also offer other in-depth colour blind test to classify the nature and severity of particular color deficiency (Buta Warna, 色弱).
Farnsworth D-15 Test
This alternate colour blind test differentiates various types of moderate red-green or blue-yellow colour vision defects.
L'Anthony Desaturated Test
In this colour blind test, it tests for mild colour blindness caused by eye disease (ocular pathology).
This is a very sensitivity test that picks up very mild colour vision problems. This test is to determine if one is lacking red or green receptors. But it can't tell exactly what or which receptors someone is lacking. Lack of red and green receptors are the most common causes of colour blindness.
City University Colour Vision Test
This test can detect whether you lack red, green and/or blue receptors. It uses colours we see in daily life, and it compares colours to colours. As a patient, one would not know whether they passed the test or not.
HRR Colour Vision Test
This test is like the Ishihara test. This test is to detect when one is lacking blue receptors. It also determines if the colour deficiency is mild, moderate or severe.
Frequently Asked Questions (FAQ) on Colour Blindness
While colour blindness has no cure, special lenses exist to increase the contrast and help with colour perception. Thanks to the Colorist System we are able to help people who are colour blind.
These Colorist Systems can be worn as either contact lenses or spectacles. This gives colour blind people a whole new world of colour in their life. Colorist Systems can include Chromagen lenses, ColorMAX, Colorlite, Colorview and more.
Treat Your Colour Blindness
Mr Stanley is dedicated in helping his patients with Vision problems overcome their visual roadblocks to achieve successful visual clarity.