Eyes.



 How your eyes work: Light rays reflect in to your eye through the cornea. The cornea bends and refracts ray to pass through a round hole called the pupil. The iris is the colored part of the eye around the pupil that opens and closes to allow a certain amount of light in. The retina helps focus on thing. The retina contains millions of tiny cells called rods and cones, which are named after their shape. These cells in the retina convert the light into electrical impulses. The optic nerve sends these impulses to the brain where an image is produced. Color blindness: color blindness is mainly dealing with the trouble with seeing red, green or blues. Some people may only see in black and white but that is not very common. 1 in 12 men have color blindness and 1 in 200 women are color blind .

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[] Color-blindness affects around 3.5 million people in the United States and 300 million worldwide. Several years of R&D, EnChroma designed a lens that would correct the most common forms of color-blindness. We all have three kinds of light receptors in our eyes. One primarily sees red, another sees green, and another sees blue. However, with most color-blind people, the red receptors see too much green, or the green ones see too much red. While the glasses work on an impressive 80% of people, they don’t correct the underlying condition of those cones “seeing” too much of the wrong color. the glasses available from $339 each, and 300 million color-blind people worldwide, many users could actually either afford the glasses, or have their insurance companies pick up the tab.

estimates 40% of cases go undiagnosed.

(n.d.). Retrieved June 9, 2015, from http://www.alz.org/national/documents/052915-Funding Release.pdf)

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How Your Eyes Work. (n.d.). Retrieved June 9, 2015, from http://www.aoa.org/patients-and-public/resources-for-teachers/how-your-eyes-work?sso=y

Types of Colour Blindness. (n.d.). Retrieved June 9, 2015, from http://www.colourblindawareness.org/colour-blindness/types-of-colour-blindness/

Facts About Color Blindness. (n.d.). Retrieved June 9, 2015, from https://www.nei.nih.gov/health/color_blindness/facts_about

(n.d.). Retrieved June 9, 2015, from http://www.alz.org/national/documents/052915-Funding Release.pdf