We
can see bright colors surrounding environment because our eyes have
color receptors called cone cells. A healthy and normal eyes have cones
that can capture the three primary pigment colors: red pigment, green
and blue.
For
those who suffer from color blindness, one of the cone cells in the eye
is not working properly, so they are not able to distinguish colors
correctly. In most cases of color blindness, damage occurs to the red or
green cone cells, causing the sufferer trouble distinguishing a variety
of colors. In addition, in some cases the cone cells will capture the
color spectrum overlap.
EnChroma glasses to help colour-blind people see colours. (PIcture from: http://bit.ly/1UagK0J) |
Right: City of Venice seen by the normal eye. Left: City of Venice seen by people with color blindness. Existing curve below shows the difference spectrum are both accepted by the cone cells. (Picture from: http://bit.ly/1fD1hIV) |
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