What is the vision test table?

Every third inhabitant of the planet has problems with vision. Probably, many regret that they did not go to the oculist and did not pass the test. Timely treatment and correct correction would help them change the situation for the better.

When is the vision test performed?

Babies are beginning to check in the children's polyclinic. Organized examinations are also held in the kindergarten. It is also necessary to check before going to school. The examination table is available in the office of each school doctor. Adults, when passing obligatory medical examinations, have to check their eyesight upon admission to study, employment, and also if a driver's medical certificate is needed. There are professions for which compulsory periodic medical examinations are determined (for those working in hazardous working conditions). In this case, the medical examination, including a visit to the oculist, is organized by the head of the enterprise. So every person faces a vision test.

What are they doing in the ophthalmologist's office?

To determine how well a person sees, there is a table for testing visual acuity. Although this is not the only controlled indicator. As a rule, the visual acuity helps to identify a nurse or an oculist. This is done using special instruments, using pictures for children or letters - for adults.

How does the lookup table work? Schoolchildren and adults are tested according to the method of Golovin-Sivtsev. On the wall in the office hangs a small box with illumination from the inside. The brightness of the lamps providing light must comply with the established standard. The bottom edge of the box must be at a distance of 120 cm from the floor. The frosted glass closes on the left a table of letters for checking the vision, on the right - 12 rows of rings of different sizes, open in a circle. Exactly opposite in 5 meters from the table there is a chair for the person being checked. The left check table also consists of 12 rows of letters of the Russian alphabet, decreasing in size from top to bottom. It is recommended to keep your head straight, so as not to strain your neck and not look under your brows.

Ophthalmologist's eye examination table - a classic variant

The eyesight of each eye is checked separately. Another organ of vision is suggested to cover with a small scute, without pressing on the eyeball. The nurse points the letter under study, starting from the bottom, from the tenth row, and asks to be called. Vertically, the pointer rises to the uppermost row. Each row has its own digital value for assessing visual acuity from 1.0 (good vision) to 0.1. In addition, the sister shows the letters horizontally in each row. Sometimes a person does not see all the signs of the series. Thus, the visual examination table allows you to assess whether you have short-sightedness or farsightedness. If the upper four rows do not recognize 2 letters, and in four under them - 1 character, visual acuity is considered incomplete. When a person sees badly, and only the uppermost letters (which corresponds to visual acuity less than 0.1), his chair is brought closer to the table by 0.5 m on the marks on the wall or on the floor, until he discerns the letters. The doctor gives an opinion on the severity and completeness of vision for each eye. Then performs correction with a set of lenses.

Other ways to test visual acuity

If in the office it is not possible to set the required distance of 5 meters for verification, the patient is seated closer, and the doctor uses special formulas to calculate actual visual indices. The right table with Landolt rings also allows you to establish visual acuity. This vision test table is adapted to cases where the patient either does not know the letters, or can not call them if he, for example, is deaf and dumb. Here it is required to indicate by hand where the rupture of the ring is located (right, left, above or below). The rings are displayed by the medical worker in the same order as the letters. There is an opinion that the table can be learned by heart and deceived by the doctor. Believe, it not so. In these cases, the right part of the table also helps the doctor.

How will vision be monitored in preschool children?

To determine the ability to clearly see pre-school children there is a special table of vision tests for children. By the name of the authors it is called Orlova or Oleinikova's table. The creators proceeded from the fact that preschool children do not know the letters, so they used popular icons or pictures. Working with children requires a patient preliminary explanation of what exactly is required of them. It is recommended first to bring the baby to the table, show pictures and ask them to name, to make sure, how correctly he does it. And only then start showing the images, and in the same order as the adult letter, but slower. Now it is possible to check the visual acuity with the help of the demonstration of tables by a special projector. This method is already good in that it allows us to identify the problem on our own and force them to turn to a specialist. But all the same, communication with a doctor is much more useful.

Prevention of visual impairment in schoolchildren

It is very important that the child, despite the increasing school load, maintains good vision before reaching adulthood. Here are some tips for keeping your child or you (tips also relevant to adults) not getting farsightedness or nearsightedness:

• Keep an eye on the lighting - it should be bright enough, especially during reading, working at the computer and so on;
• The distance between the TV and the child should not be less than 2-3 meters;
• Every 2 hours of work on the computer, reading books and the like, take a break for 10-15 minutes;
• Also the doctor can advise special exercises to strengthen the eye muscles and prevent falling vision;
• Take special supplements with vitamin A and lutein, the latter is also abundant in blueberries;
• Spend more time outdoors, take a walk, go in for sports.

Follow these simple tips, then problems with vision will bypass you and your child.