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Color Blindness - MedicineNet
If there is some problem with the pigments in the cones, the eye will not see colors in the usual way. This is called color deficiency or color blindness.
http://www.medicinenet.com/color_blindness/page2.htm
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Color Blindness - MedlinePlus
Color blindness occurs when there is a problem with the pigments in certain nerve cells of the eye that sense color. These cells are called cones. They are found in the light-sensitive layer of tissue at the back of the eye, called the retina.
https://medlineplus.gov/ency/article/001002.htm
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Color Blindness - Topic Overview
Color blindness means that you have trouble seeing red, green, or blue or a mix of these colors. It's rare that a person sees no color at all.
http://www.webmd.com/eye-health/tc/color-blindness-topic-overview
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What Causes Colour Blindness? - Colour Blind Awareness
An explanation of the causes of colour blindness or colour vision deficiency
http://www.colourblindawareness.org/colour-blindness/causes-of-colour-blindness/
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What Is Color Blindness? - American Academy of Ophthalmology
Color blindness occurs when you are unable to see colors in a normal way. Most commonly, color blindness happens when someone cannot distinguish between certain colors.
http://www.aao.org/eye-health/diseases/what-is-color-blindness
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What is Colour Blindness? - Colour Blind Awareness
An explanation of what colour (color) blindess or colour (color) vision deficiency is
http://www.colourblindawareness.org/colour-blindness/
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What is Color Blindness, Causes, Tests, Types - Color Blindness
Color Blindness affects up to 10% of the population. Take one of our Color Blindness Tests - are you red green color blind, blue yellow, or total?
http://www.colour-blindness.com
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Colorblindness - Causes of Color
Hundreds of millions of people have vision problems. Colorblindness affects as many as 1 in 12 men and 1 in 200 women.
http://www.webexhibits.org/causesofcolor/2A.html
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What is Color-Blindness? - Color Matters
Color-blindness is the inability to distinguish the differences between certain colors. This condition results from an absence of color-sensitive pigments.
http://www.colormatters.com/color-and-vision/what-is-color-blindness
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Color Blindness Test - Enchroma
EnChroma: Color Blindness Test and more.
http://enchroma.com/test/instructions/
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Facts About Color Blindness - National Eye Institute
National Eye Institute, NIH, is dedicated to vision research that saves sight & reduces visual impairment & blindness.
https://nei.nih.gov/health/color_blindness/facts_about
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ColorVisionTesting: Colorblindness
The human eye sees by light stimulating the retina (a neuro-membrane lining the inside back of the eye).
http://colorvisiontesting.com/color2.htm
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Colblindor - All about Color Blindness
Most important starting points when diving into the topic of color vision deficiency can be found hereafter. There is also the possibilty to navigate directly a little bit deeper through some menu items above.
http://www.color-blindness.com
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How Color Blindness Affects Your Daily Life - All About Vision
Learn about types of color blindness such as red green deficiency, and how to cope with daily vision problems.
http://www.allaboutvision.com/conditions/colordeficiency.htm
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Color Blindness - Wikipedia, the Free Encyclopedia
Color blindness, or color vision deficiency, is the inability or decreased ability to see color, or perceive color differences, under normal lighting conditions.
https://en.wikipedia.org/wiki/Color_blindness
