Aphrodite Livanes Optometrist Alexandra Hills, is proud to be Brisbane’s only Colour Blind Sight Centre™, and is dedicated to helping people with this condition to experience a brighter world.
Although most people have heard of “colour blindness”, the correct terminology is actually “Colour Vision Deficiency” or CVD. And thanks to the wonders of modern technology, treatment is now available in the form of colour blind glasses and contact lenses!
Colour blindness is usually determined by a particular set of chromosomes inherited from the parents, and is present from birth.
The condition affects more males than females; approximately 8% of males are colour blind, compared to only 0.5% of females (1). Having a male relative with CVD on the mother’s side of the family, increases the likelihood of the condition.
Children with congenital colour blindness have never seen the world any differently, so they usually do not even realise that they are colour blind.
Parents may notice that their child is having trouble with identifying colours, or that they have a low tolerance for colouring in, or other activities which are reliant on colour.
Eye testing by an optometrist is the best way to discern a colour vision deficiency in your child. We believe it is important for children to see a behavioural optometrist before they start school, because children’s vision problems (like colour blindness) can have a negative impact on learning.
Vision is truly an amazing process. Receptors in the retina at the back of the eye send signals to the brain via the optic nerve, to be interpreted as sight.
There are two types of these receptors – rods and cones. The cones, concentrated mainly in the area called the macula, are responsible for colour pigment. There are three types of cones responsible for the colour signals, each containing a different pigment.
Colour blindness results from one or more of the different cone systems either not functioning at all, or functioning in an unusual way. Most commonly, CVD leads to problems in distinguishing red and green, and the various shades of these colours.
However, colour blindness can also affect combinations such as red/brown, purple/blue, pink/grey, and green/yellow.
Our Brisbane optometrists can diagnose colour vision deficiency, by conducting various tests and assessments. One of the most well-known of these is the Ishihara plates test – you will find a simplified example of what it involves, at the bottom of this page.
Although there is no cure for CVD, the good news is that in recent years there has been a breakthrough in colour vision technology.
People with CVD can now experience a greater range of colour (2), by wearing specially prescribed colour blind glasses or contacts, fitted with iRo lenses.
Every person perceives colour differently, and the severity of CVD can vary greatly. As a Colour Blind Sight Centre™, at Aphrodite Livanes you can be assured of a Brisbane optometrist with additional training assisting you with a comprehensive colour vision assessment, and choosing iRo lenses to help compensate for your colour vision deficiency. If you require a prescription with your colour lenses, we can do this as well.
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