Acuity
- What kind of exercise for the eyes? It is clear that there are exercises for the neck, arms, legs. But exercises to strengthen eye muscles? ..
Each of us have had to visit with an ophthalmologist (eye doctor). He checks the sharpness of vision with the help of special tables (tables Golovin-Sivceva) in one half of which are located 12 rows of letters of various sizes and in the other – rows of circles with a gap directed up, down, left or right. In normal visual acuity (checked from a distance of 5 meters alternately for one, then the other eye), we must distinguish and name displayed in 2-3 seconds, the letters in 1-10-th rows of the table (or say in which direction breaks aimed at blacks circles),. If we have coped with this challenge, the visual acuity is considered to be complete and is estimated as equal to unity.
In preschool children the visual acuity is evaluated using tables and pictures.
However, data on visual acuity alone is not sufficient to judge whether the normal function of the organ of vision. Therefore, an ophthalmologist examines color perception (usually with the help of a special book – tables Rabkin), peripheral vision (ie, field of view – a space that you can reach with a fixed gaze), assesses your ability to distinguish objects in a short time (the so-called exposure vidiometriya) moving objects (dynamic viziometriya), as well as accuracy of performance of visual tasks. In addition, the doctor examines the state of the fundus and intraocular pressure. As you can see the status of judge not on the basis of any one of its characteristics, and their complex. However, carefully evaluating the changes in their ability to see better, more (or, conversely, worse), even without the control of visual acuity on a special table, you’ll notice in a timely manner at least some changes in the function of the organ of vision and see a doctor (this is particularly important for children and Adolescents who quickly figures may change in visual acuity, as well as for people over 40 years).