This test measures how well you see from a distance. Note that the test results are indicative, as such they shall not be used for diagnosis purposes and can not replace regular examination with an ophthalmologist.
How to make the test:
Measure the height of the first letter in millimetres (since it may vary depending on your monitor) and enter the value in the designated blank field. Below you will automatically receive the distance you have to stand away to make the test correctly.
First test the right eye by closing the left one. If you wear glasses use the for the test. Your visual acuity optimal is optimal if you distinguish the symbols from the line highlighted in red.
If you experience difficulties or have doubts about your eyesight, visit eye specialist.
TEST FOR ASTIGMATISM:
Move away about a meter from the screen. Make the test without glasses or contact lenses. First cover your right eye. Focus on the centre of the image (i.e. Astigmatic mirror). Do some of the lines look clearer or darker than others? Are the lines evenly spaced? Repeat the test by closing your left eye.
Repeat the test with the image below:
People without visual disturbances, see the lines equally dense and equally clear, evenly spaced from one another. If some of the lines seem to you darker than the others or spacing is uneven, you may have astigmatism. Note that the results of this test are indicative, as such they shall not be used for diagnosis purposes and cannot replace regular examination with an ophthalmologist.
COLOUR VISION TEST:
This test serves to detect any disturbance in your colour vision. Take a pen and paper to keep track of your answers. Look at the first image. What figure do you see between the dots? Continue with the next image. Correct responses are given under the tests.
Were you able to distinguish the following numbers: 74, 45, 42, 15, 12, 29, 5, 6, 2, 2, 96 ?
If you have not properly distinguished the number of an image, you may have disturbances in colour vision. If in any doubt, contact your ophthalmologist.
Amsler grid is used to detect any potential visual disturbances. It is one of methods to diagnose macular degeneration. How to use the grid: Place the test at about 30 cm from your eyes and focus on spot in the centre. If you wear reading glasses you should carry the test with them. During the test the other eye should be closed. If everything is alright with your eye, once you focus on the spot (in the centre), all lines should be straight, all intersections should form right angles. If you notice any blurred, wavy or missing lines or distorted rectangles this probably means changes in the retina. Note that the results of this test are indicative, as such they shall not be used for diagnosis purposes and can not replace regular examination with an ophthalmologist.