sight
Vision is one of the most important senses, and it is possible to assess the safety of the eye through several indicators, such as: the ability to distinguish colors, the ability to distinguish objects, and vision, and divided eye examinations into two main sections; the first section is the initial external examination, Iris, cornea, conjunctiva, and nebulae. The second type is the most accurate. The doctor examines the internal parts of the eye through accurate medical devices that specialize in eyeoscopy. In this article, we will discuss how to test the eyesight in general.
Types of sight examination tests
Check the visibility
Measuring the visibility of numbers and letters at a specified distance, doctors usually use the famous Snelli plate, in which English characters vary from the largest to the smallest.
Examine the external muscle strength of the eye
Move the eye muscle in all basic vision directions, such as: top right, left, top left, or right-hand.
Check the peripheral vision
Put two people in exchange for each other, and at a distance of three feet, who shall each party cover with an eye corresponding to him, and Saalhma on the number of fingers covering the eye the other person, where is this examination of the types of important tests that you know how peripheral vision tunneled people, and are suffering The person of the blue water in his eye or not.
External eye examination
The use of different light sources to examine the tissues surrounding the eyelids and the eye, to look for any changes to the eyelid inverted or lax, as the pupil is examined and size, and his reaction to the lights.
Check color discrimination
The use of meta tags containing numbers, letters and shapes, or a wide range of dots in the colors and brightness in the background in the picture, and then ask the patient about the figure or shape shown in that painting, and what colors are in it.
3. Examine the stereoscopic vision of objects
It examines the individual and double vision of the patient, as well as his or her visual ability to perceive the universe in its three dimensions. This test is usually used in driving license tests.
Eye examination through the Amelstre network
Is a network consisting mainly of vertical and horizontal lines, to monitor the central vision of the person, and determine the incidence of various eye diseases, especially retinal atrophy.
Other types of examination
- External examinations to detect diseases of the eye, especially the strabismus or laziness.
- Scanning through the microscopic microscope: through which the examination of the internal tissue of the eye by highlighting them.
- Examination of eye pressure disease through eye strain.