![]() ![]() ![]() This image is then carefully looked at to separate different objects, to see shapes and sometimes colors, and to link these to other kinds of information. Those parts of the brain interpret the signals.The signals move along nerves to special parts of the brain.Some of them are stimulated and create an electrical signal. Light hits specialized nerve cells in the eye.There are three steps in the process of telling the difference between colors: As of 2009, the word daltonism is used only for the type of color blindness called deuteranopia. Because of this, the condition is sometimes called daltonism. The article was called "Extraordinary facts relating to the vision of colours". That was after he found out that he was color blind. In 1798, English chemist John Dalton published the first scientific article about color blindness. However, people who are color blind have one advantage: they are sometimes better at seeing through some types of camouflage. People usually think of color blindness as a disability. Between five and eight percent of males, but less than one percent of females, are color blind. Many more males are color blind than females. There is no treatment cure for permanent color blindness. During certain kinds of migraine, some people are unable to tell the difference between certain colors. Some conditions can lead to temporary color blindness. It can be caused by coming into contact with certain chemicals. Sometimes, it is the result of damage to the eyes, nerves, or the brain. ![]() Most color blindness is heritable, usually as simple Mendelian inheritance. People with color blindness cannot tell the difference between certain colors. This illustration from 1895 shows the US flag as it seen by those with normal vision, and also those with different types of color blindness ![]()
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