Information about the visual field test
What is a visual field examination
The visual field examination or perimetry involves examining the external and internal limits of the visual field as well as the sensitivity of the visual function outside the fixation site. The field of vision encompasses the area of vision that can be captured with motionless eyes and head. A rough estimation of the visual field is made with a simple parallel test, in which the patient's field of view is compared with that of the examiner. An exact visual field is determined by computer perimetry, which can be done by a specialist.
There are no contraindications for the use of the procedure. However, care should be taken to ensure that the patient's compliance (cooperation) is adequate.
How to perform a visual field examination
Simple parallel test: Patient and examiner are facing each other at a distance of 26 inches. The patient covers one eye and fixes with the other eye the uncovered eye of the examiner. He moves the half extended arm slowly from the outside into the field of vision from different directions with the index finger raised. The patient gives a signal as soon as he sees the finger. This allows you to roughly determine the appearance of the visual field in the outer area of the field of view.
Computer perimetry: Light points are projected onto a screen and the patient indicates as soon as the light points are detected by pressing a button. The light points are either approached from the outside (kinetic visual field examination) or the light points illuminate directly at fixed points on the screen for a short time (static visual field examination). The result is evaluated by computer and a map of the visual field is created. It is important to always focus on the central punk and not to look at the individual points. Different light intensities and sizes can be adjusted to test the sensitivity of vision in different areas.
Visual field test of the saccading training:
This free test can be carried out at home on the computer and is based on the principle of perimetry described above.
Attention: This test does not replace a medical examination. It is NOT intended to prevent, treat, cure, alleviate or diagnose disease! Moreover, it is not suitable for altering anatomical functions or structures of the human body.
- Internet connection
- Big screen (min. 15 inches)
- No head and eye movement
- Concentration range of min. 2 minutes
- Sit in a distance of approx. 12 inches in the middle of the screen.
- Fix your head (e.g. with one hand),so it will not move.
- Fixate the center of the screen with your eyes.
- The test takes about 2 minutes
Advantages of the test:
- Fast execution
- Simple operation (incl. pre-test)
- Different modes: Simple or detailed
- Results are easily shared
- Free of charge
Pictures of the test:Test instruction:
Test your visual field free of charge and in only 2 minutes:
Free visual field test