how do we know that all the apparently "normal" seeing people are actually the colour blind ones and the "colourblind" people are actually seeing the right colours?
2007-03-14 08:57:01 · 5 answers · asked by sazzy_b 2 in Health ➔ Other - Health
Colorblind people usually have a deficiency in how the cones in their eyes work, everyone sees colors a little differently, but color blind peoples cones do not work properly, or at all.
2007-03-14 09:05:09 · answer #1 · answered by heavy_cow 6 · 0⤊ 0⤋
There are standard charts(Ishihara) which sort out those who have normal colour vision, they can see the numbers, patterns or letters, from those that can't. You can see these, and test yourself on: http://www.toledo-bend.com/colorblind/Ishihara.html
2007-03-14 23:42:36 · answer #2 · answered by Dr Frank 7 · 0⤊ 0⤋
tests are carried out at schools, primary age
2007-03-15 00:11:05 · answer #3 · answered by chakra girl 7 · 0⤊ 0⤋
Yeah, really! And how do I know that my red is your red? What if your red is my green? How would we know? Deep, huh?
2007-03-14 09:05:18 · answer #4 · answered by philyra2 4 · 0⤊ 0⤋
consult an optalmologist.
2007-03-14 09:06:28 · answer #5 · answered by meaurge 2 · 0⤊ 0⤋