Violation of the color spectrum often not only causes discomfort, but provokes certain restrictions in some areas of human life. So, problems of visual perception can provoke a ban on driving, as an option. That is why you should be notified how color blindness and a driver's license can get along in 2017.
Characteristics of the disease
The vowel feature is that the human eye cannot distinguish one or two colors. The retina of the eye has in its structure boxes in which there are pigments of yellow, blue and red. They are the main ones. All other shades and colors can be seen by a person when these three colors are mixed.
If one of the pigments is missing or its quantity is not enough, the person does not perceive this or that color correctly. Usually there is a deficiency of red pigment.
Such a disease can develop for some reasons:
received injury;
birth anomaly;
other diseases of the eye.
The disease is usually transmitted from mother to child. In this case, the mother may be completely healthy.
Forms of the disease
A medical certificate for a driver's license with a violation such as color blindness can enroll a person on the list of pedestrians forever. Doctors believe that normal perception is a trichromatic vision of the world, when a person has all the pigment in sufficient quantities. If such a balance is violated, then one of the forms of this violation will manifest itself:
tritanopia is a purple-blue color deficiency. A person can see green or red instead.
Deuteranopia - does not stand out green. His person can confuse with orange or pink.
Protanopia - a person can see brown or dark green instead of red.
Drivers colorblindness
How realistic it is to get a driver's license in 2017 in case of violation of color perception, an ophthalmologist determines. Drivers who have such deviations, until 2012, could drive vehicles that belong to categories B and A. At the same time, there was a record in the rights that the driver could not be employed, that is, he could use a motorcycle or car exclusively in personal purposes.
Different countries have different attitudes towards this situation. European countries have never had such restrictions. Although the public reason for the ban is that the driver cannot distinguish the color burning at the traffic lights, he already knows exactly where they are located. 
In our country, 2 years ago, a law was passed banning drivers with the violations in question from driving. Regarding drivers who received their rights before the entry into force of the law, when reissuing a document, they can receive a medical certificate for driving in the future.
Opinions were divided on this issue. Many say that this is strong discrimination, since it is much more difficult to drive a car with myopia, but drivers with such a problem are still given a license.
Eye test for color blindness
Color vision testing for driver's licenses is done using polychromatic tables. The following types are commonly used:
Ishihara tables;
Rabkin tables.
One such image is a combination of chains, figures and numbers, made up of a large number of colored circles with the same brightness. There are 27 tables in the main set.
The system functions like this - if the patient does not distinguish colors, then the image seems to him homogeneous. If a person does not have color blindness, then he can distinguish between chains, circles and numbers.
In order for the results to be accurate, it is important that the following conditions are met:
the distance of the picture from eye level is 1 m, it should be shown for 6-7 seconds.
The subject must be in a calm and relaxed state.
there should be natural light in the room, the subject should sit with his back to the window.
Video:
Ed Sheeran
