Understanding How We See Colour

Colour vision deficiency (CVD) is a condition where a person has difficulty distinguishing between certain colours. It occurs when the cone cells in the retina, which detect different wavelengths of light, do not function normally.

Colour vision deficiency is usually inherited, although it can also develop later in life due to ageing, certain eye conditions, health conditions, medications or eye injuries.

Types of colour vision deficiency

There are several types of colour vision deficiency, with red-green deficiency being the most common.

Red-Green Colour Deficiency
The most common type of CVD. It can make it difficult to distinguish between certain shades of red, green and colours containing these tones.

Blue-Yellow Colour Deficiency
Less common and can make it harder to distinguish between certain shades of blue and yellow.

Monochromacy
A rare form of colour vision deficiency where colour perception is severely reduced. Depending on the type, vision may be limited mainly to shades of grey.

The severity of colour vision deficiency can vary from person to person. Some people may have difficulty distinguishing only certain shades, while others may experience more significant colour perception difficulties.

Children may not always realise that their colour vision differs from others. A colour vision assessment can help identify any difficulties early, especially if they are affecting schoolwork or everyday activities.

Can colour vision deficiency be corrected?

There is currently no cure for inherited colour vision deficiency. However, specialised colour filter lenses may help some individuals distinguish certain colours more easily.

These lenses work by filtering specific wavelengths of light to enhance the contrast between colours that may otherwise appear similar. They do not restore normal colour vision, but may help improve colour discrimination for certain people.

The effectiveness of colour filter lenses can vary depending on the type and severity of colour vision deficiency. A colour vision assessment can help determine whether they may be suitable for you.

See colour more clearly

If you or your child has difficulty distinguishing certain colours, a colour vision assessment can help identify the type and severity of colour vision deficiency.

Visit us for an eye examination and speak with our team about your colour vision needs. We can assess your colour perception and discuss the available options to help you navigate everyday tasks with greater confidence.

Understanding how you see colour starts with understanding your eyes.