Re: Color blindness

Subject: Re: Color blindness
From: Char James-Tanny <charjtf -at- gmail -dot- com>
To: techwr-l -at- lists -dot- techwr-l -dot- com
Date: Wed, 30 Mar 2011 10:15:05 -0400

Hi, John :-)

> Does anyone know of any studies on the occurrence of color blindness
> in the general public?

Color blindness (more commonly known as "color deficiency") affects
approximately 12% of the population, primarily males. The percentage
varies according to the type of color deficiency (red-green,
blue-yellow, complete absence of color).

> I'm particularly interested in the effect on the color blue

See http://www.nlm.nih.gov/medlineplus/colorblindness.html.

One thing to be aware of...those affected by color deficiency can
actually see colors, they just don't see the same colors those without
the deficiency do. Children are taught their colors from a really
young age (9 months or so, depending on the child and the parents),
but can't be tested until they can talk. My husband is color deficient
and can easily recognize many colors, but it depends on how much color
there is (it's easier to identify the red in a red sweatshirt than a
shirt made of red and blue checks) and what other colors are adjacent.
Neons and pastels pose particular difficulties.

Char James-Tanny ~ JTF Associates, Inc. ~ http://www.helpstuff.com
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Follow-Ups:

References:
Color blindness: From: John Posada

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