On this page you can check your vision online according to the table on the computer. The results will be approximate: in order to determine the exact visual acuity and or, tests should be carried out by a professional ophthalmologist. A free check is needed to identify the presence of any problems and make a timely decision to visit a doctor.
Sivtsev's table
The Sivtsev table is familiar to every person literally from the school bench: it is with its help that children check visual acuity every year. How is the vision test done? A table of letters, consisting of symbols arranged in 12 rows, is presented to the patient. In this case, the letters of the largest size are located in the top row, and the smallest ones are in the bottom row.
During the visual acuity test, the doctor asks to read the letters, closing either the left or the right eye in turn.
Fine a person should be able to read the top row from a distance of 50 meters and the bottom row from 2.5 meters. If a person has difficulty reading, the ophthalmologist uses special glasses with removable lenses of different optical powers to accurately determine the degree of the patient's myopia.
By the way, if you don’t know how to check your eyesight at home, you can print the A4 version of the table, hang it at a distance of 2-3 meters and try to consider all the letters:
Vision test: Sivtsev's letter table
Table Orlova
Sivtsev's table, which was mentioned above, is made up of letters. The question may arise: how to check the eyesight of children who have not yet learned to read? For this, it is used table Orlova .
The table consists of pictures having different sizes. The pictures are arranged according to the same principle as the letters in the Sivtsev table: from the first row with large images to the last with small ones.
Fine a child from a distance of 5 meters must distinguish the pictures in the last line. If there are problems with distinguishing between images, the child is asked to approach the table until he names the selected picture.
Using the table, you can check your eyesight at home. If violations are detected, the child should be shown to an ophthalmologist:
Pictures for checking vision in children: Orlova table
Golovin's table
The table of the ophthalmologist Golovin consists of an image in the form of broken rings. Rings are located in 12 lines, while their size decreases from line to line. Vision according to this table is determined in the same way as according to the Sivtsev table. As a rule, the Golovin table is used in conjunction with the Sivtsev table.
Why is the Golovin table so in demand? It's very simple: many people need their medical record to contain information about their vision that does not correspond to reality. It is quite possible to memorize Sivtsev's table, but such a trick is impossible with Golovin's table.
For this reason, the Golovin table is considered a more reliable method: if the patient "simulates" one hundred percent vision, he will not be able to remember at what level a certain ring breaks (of course, if he does not have an eidetic memory). Therefore, letters for checking visual acuity are far from always suitable, and torn spheres are an almost universal ophthalmological test:
Golovin's visual acuity test table
duochrome test
Using such a test, an ophthalmologist examines such a parameter as eye refraction a. The method is based on such a phenomenon as chromatic aberration, the essence of which is the difference between the degree of refraction of rays that differ from each other in wavelength.
Short waves ( green) should be refracted more actively than long ones ( red). Therefore, green rays should be focused closer to than red ones. Normally, the eye should be nearsighted for greens and slightly farsighted for reds and purples.
During the duochrome test, the doctor determines against which background the patient sees letters better. If it is easier for the patient to see the images on the red half of the table, then he suffers, if on the green - he is diagnosed. An ophthalmologist will have to look at such a two-color table only if the visual impairment is sufficiently small or an ultra-precise correction is required.
Vision board: duochrome test
Astigmatism test
Normally, the eyes should also have the shape of a regular sphere. If the curvature is violated for one reason or another, they speak of such a pathology as. It is astigmatism that causes a number of visual defects. In addition, in patients suffering from astigmatism, in addition to myopia and hyperopia, symptoms such as headaches with prolonged eye strain, as well as doubling of objects that fall into the field of view, are observed.
Special ophthalmic tests are used to detect astigmatism. For example, the patient is asked to consider the image of lines that diverge from the center in the form of rays. In the presence of astigmatism, the lines, not reaching the middle, begin to “converge” with each other, brighten or even disappear altogether. In addition, with astigmatism, the patient will see the image shown to him not as a circle, but as a complex geometric figure or ellipse.
Eye Test Pictures: Astigmatism Test
During another test, the patient is presented with an image in the form parallel lines grouped by three units. The lines diverge radially from the center of the image. In the case of astigmatism, it seems to the patient that the lines are not black, but are colored unevenly, and are not parallel, but at a slight angle to each other.
Astigmatism test
Color vision test
The definition of such a pathology as involves the use of special pictures to test vision for color perception, which are called Rabkin's tables . Such tests are images consisting of many circles. All circles have the same brightness, but are colored in different shades, due to which the image is formed. Each table shows a number that the patient must consider and name.
The test consists of 27 main tables and 48 additional ones that can be used to clarify the diagnosis, that is, the type of color blindness, for example, to determine insensitivity to a certain range of shades. Carrying out a color perception test for drivers is a mandatory step that must be completed before obtaining a license.
Can you see the numbers in each of the pictures?
Pictures for checking vision for color perception
