What are the defects of colorblindness?

Answer 1

Your retina has cells that are sensitive to light called rods and cones, the rods are more sensitive to light intensity and the cones are more sensitive to color. In colorblind people, there are fewer cones. The severity of colorblindness can vary depending on which cones are missing and how many are missing. colorblindness is very common about one in 8 men have it.

Answer 2

more info:
Color Blindness
Color blindness is used in colloquial terms to refer to the difficulty in telling colors apart but a more correct term would be color vision defect. Color blindness is a misnomer because only a small percentage of people are unable to see any color.

Color vision is important in many everyday tasks, such a driving a car (does that traffic light mean "stop" or "go"?). Persons with color vision defects may be at a disadvantage in school or at work. In fact, lack of normal color vision may limit career opportunities. For example, normal color vision is vital in such jobs as color printing and color photography. Abnormal color vision can even be dangerous in certain situations, such as in rail and water navigation. For this reason, persons with color vision defects are excluded by law from certain occupations.

What causes color vision defects?
Color vision depends on the absorption of light by visual pigments contained within specialized cells in the eye called photoreceptors. There are two types of photoreceptors: rods and cones. Rods, which provide vision in dim light, have no ability to distinguish between colors. Cones are responsible for color vision. There are three different types of come pigment in the normal eye. Color vision occurs within the visual part of the brain compares electrical signals from the different types of cones.

Answer 3

Color blindness is a genetic trait that results from mutations in any of the opsin genes. Opsin genes code for the proteins in the retina that detect different colors of light. Mutations in these genes result in the inability to detect certain wavelengths of light...thus, colorblindness.

Answer 4

colorblind people can not differentiate betweek red and green color.
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AK