These tests will only take a couple of minutes and will give you an idea of your vision abilities. Follow the instructions given. There are seven tests for different vision issues. Make sure when testing for light sensitivity to put your screen brightness on standard.
The Snellen chart (the letters in decreasing sizes) should be printed out on A4 and then placed 3 meters away from you. All the directions for the correct usage of the chart can be found on the first page of the document.