Colour blindness – more correctly referred to as “colour vision deficiency” – is a very variable condition. Individual sufferers have difficulty with recognising different sets of colours on the spectrum. And the severity ranges from experiencing only slight difference in your appreciation of different hues, through to almost total inability to differentiate colours.
This condition occurs more often in men, affecting around 1 in 20 in the UK. It is much less common in women, affecting only 1 in 200. Total colour-blindness (i.e. seeing only shades of grey), however, is extremely rare.
People are not always aware that they suffer from mild colour vision deficiency. We strongly recommend having your eyes tested by your optician at least every 2 years. If you have any concerns at all about your colour perception, make sure you ask for an eye examination that includes a test for colour vision.
There is no treatment for colour blindness. Sufferers generally have to adapt to the condition.