| It is very difficult
to describe to somebody having a normal colour vision how we, who get a
different impression of colours, see thing around us. And we will hardly
understand the opposite.
The pictures below look exactly identical for a person who has a different
red/green colour vision. But for someone with normal colour vision, there
is a digit visible in the lower picture. If you want to know what digit
it is, put the cursor over the picture for a couple of seconds
| Friends have told
me that the contrast between red and green is as great as between blue and
Imagine that the Swedish flag was blue and blue…
A good web site
with relevant information on colour vision
blind" person sees the world is
|The original picture is collected from Colorvisiontesting.com
Click for another
test of colour vision
in the Netherlands
Why is it like this?
Every 12th man and one woman out of 200 have a different colour vision. Most common is the hereditary variety that hit 8% of all men 0,5% of women in the western world. You may also get a problem with your colour vision because of some diseases, e. g. glaucoma, diabetes and MS.
What do you see?
A person who has a different red-green colour vision will
get the same impression from certain green, brown, red and orange shades.
But we do not see the world in only grey shades but may usually enjoy
colours around us. But the effect is that we might either be unsure of
what colour something is, or, we may quite simply not see it! Red apples
disappear among the green leaves. It is also difficult to tell what is
blue/lilac, pink/bluegreen or grey, yellow/bright green, orange/green
and so on.
The different red-green colour vision is also called colour blindness or colour deficiency.
There are also persons
who have difficulties with some shades of blue and green and some people
mix up blue with yellow. Further, a few persons see the world only in
grey shades. Also in this situation the Seekey is useful.
The attitude to colour
Colour vision is rarely discussed in everyday live. It is generally considered
that a person with a different colour vision that cannot be helped, or
even that they would be uninterested to get a remedy. However, in
a test that a British company conducted, it was stated that people travelled
on their own expense from all over The United Kingdom, and even from Australia,
New Zealand, Mexico and Trinidad, hoping to improve their colour vision.
Read more on how the Seekey will make life simpler for a person who has a different red-green colour vision.