Color blindness test with numbers online, Rabkin table with the result

When applying for a job, it is sometimes required to pass a color perception test. Color blind people cannot distinguish some colors, mainly red and / or green. It is transmitted through the female line, but is rare in the fair sex.

It is more difficult for men, about 10% of males suffer from color vision disorders. This is a hereditary disease, but it can appear with severe injuries.

It is better to regularly take special tests using pictures to test your vision, especially if you want to work as a driver or other professional where vision is important.

Definition

Color blindness is the inability to distinguish between a certain color: red or green. In 1974, John Dalton, one of the scientists suffering from this ailment, described the disease in detail, based on his own feelings. He created a table so that people can test their vision for color perception.

Until the age of 26, a scientist did not know about the impossibility of distinguishing red. Two of his brothers and his sister suffered from color blindness, which is where the version of heredity came from. If earlier the term was applied exclusively to the inability to distinguish one color, later it covered all violations of color perception. Now Rabkin's polychromatic tables are used all over the world.

Color blindness cannot be cured. Special glasses have been developed to help correct color perception. Now EnChroma is one of the most famous companies that started with the creation of visors for surgeons, they helped them better distinguish blood from flesh. Principle of operation: lenses are capable of transmitting and amplifying only 3 primary colors - red, green and blue. A person does not notice a certain part of the spectrum that prevents him from distinguishing between basic colors, so it is important to sometimes take tests to check color perception.

Important! Color blind people are allowed to drive a car. They normally see traffic lights, everyone knows about the prohibition of driving to the upper signal. The structure of the traffic light helps to drive the car without any problems. The law was amended recently; before, even with minimal problems of color perception, it was unrealistic to get a license. People who have been diagnosed with complete color blindness cannot drive.

Recently, game makers have been trying to develop special versions for color blind people. The Slack messenger supports color blind people, so I developed a separate version for them.

Causes of color blindness

The main cause of color blindness is a defect in the X chromosome, which is considered genetic. The incompatibility of the body and some drugs can lead to the cause of color blindness, therefore, self-treatment for any diseases is strictly prohibited. Severe trauma or disease to the eyeball can have serious consequences, causing catastrophic problems, including faintness.

Cones - nerve cells, which are located in the central part of the retina, help a person to distinguish colors. They contain certain types of pigments that can distinguish between primary colors. If any type ceases to function or does not work from birth, the person loses the ability to distinguish this particular color. This phenomenon is called dichromasia, and people who are unable to distinguish one color are called dichromats.

Types of color blindness

There are two types of dichromancy:

• protanopes - people are not able to see red;
• deuteranopes - people cannot distinguish green.

There is also a third group - tritanopia. It is very rare. Such people cannot see purple. It is worth highlighting complete color blindness - monochromaticity. In this case, all 3 types of nerve cells are damaged.

Interesting fact! Color blindness is common most often among men, it is very rare in women. The carriers of the genetic defect are exclusively women.

If you have had color blindness in your family, it is worth taking a color perception test. This can be done online using the special Rybkin table below, created to identify such a problem.

Protanop

A person who cannot distinguish between red. To determine the pathology, a person must pass tests with special drawings - Rabkin's tables for all people with such a disease. Numbers or geometrical figures of red or green colors are depicted against the background of various shades.

Protanopes are people with a genetic disorder. It is transmitted exclusively to men, but very rarely color-blind women are found. When cataracts mature, people can become protanopes. If cataract treatment is not started on time, more and more problems will gradually begin, which will lead to a complete loss of the ability to distinguish colors at the last stage. The disease often occurs with chemical poisoning, such as long-term drug use.

Important! If color blindness is acquired, it can be cured. For example, stop taking medications on time that led to the problem. Vision will begin to recover gradually, so do not think that after you stop taking medication, you will immediately recover the ability to distinguish all colors.

It is quite difficult to identify protanope in childhood. Only observation of the child will help. There are two main ways:

• If your child has a sweet tooth, wrap some candies in brightly colored wrappers. Give them to the baby and track the reaction. If a child suffers from color blindness, he will take everything. Just keep in mind that such an experiment will only help to suspect a problem. If you want to know for sure, you need to see a doctor and undergo a full examination, including a table.
• The ideal method for testing a child for color blindness and forms of color weakness is drawing. You will immediately notice the problem if the baby begins to paint the usual green grass with orange or the blue sky, as healthy people are used to seeing it, yellow. Only immediately after the drawing, ask to explain these details, because this may be an ordinary fantasy.

The best way to check both small and adults is special tests for color anomaly online or in the office of an ophthalmologist. These colored pictures with numbers, letters or geometric shapes can immediately put everything in its place. If you have any difficulties in passing the test, it is definitely worth expanding the diagnosis. It is important to determine the specific species, because a person may not be a protanope at all, but a deuteranope or tritanope.

Deuteranop

Reduced sensitivity to green is a rare condition that affects only 1% of people. In such a person, the “cones” in the visual apparatus, which are responsible for the perception of green, do not work correctly or do not function at all.

Deuteranope can see a red sunset in green or blue, the rays of the sun, which should be red, he sees blue, the sun - green. On the trees, he sees the leaves as blue, not green. This is because green is mixed with orange or pink. Red can mix with green and brown.

Heredity is the main cause of all types of color blindness. Eye diseases or severe injuries can affect the appearance of color blindness. There are such diseases:

• clouding of the crystal - cataract;
• due to diabetes retinal vessels can be affected - diabetic retinopathy;
• intraocular pressure may be too high - glaucoma;
• in the region of the central part of the retina, degenerative processes.

Some drugs can affect the appearance of color anomaly. If medications affect the visual system, there is a risk of becoming color blind if taken for a long time or incorrectly. Among these drugs, amiodarone, digoxin and erythromycin and other drugs are distinguished.

Color blindness test (Rabkin table)

Some people do not at all imply that they have one of the forms. Every driver, pilot, doctor must pass a color perception test. The test was created in the form of Ryabkin's polychromatic tables. It includes 27 colored sheets with pictures of figures or numbers.

The brightness of each picture is the same, the color is different. Deuteranopes or protanopes will think that certain tables are homogeneous. Trichromat will be able to easily distinguish pictures with numbers and figures.

For accurate results of an online color blindness test, you should adhere to these rules:

• the person should feel normal;
• you need to try to relax as much as possible;
• pictures must be installed at eye level in order to get an accurate test result for checking color blindness;
• viewing one image should not last more than 10 seconds.

Let's look at an example of a picture for an eye test for color blindness (if necessary, you can save it to yourself):

conclusions

Color blindness is not a dangerous disease, people can easily live with it. You will have to face inconveniences both in everyday life and in finding a job. These are small problems that are easy enough to solve.

If you have been injured or have been taking medications that affect the visual system for a long time, it is worth taking an online color blindness test with pictures. It will help you find out if you have problems with color perception or not. On the site you will find Rabkin's table with answers for drivers.

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