OdySight includes two different vision tests: the Visual Acuity test and the Amsler grid test. The OdySight algorithm determines which tests should be done on which days. When you open your app, it will tell you that an eye test needs to be done. Once this first test is done, you have the option of taking the day's second test.
Click on the eye at the bottom of your screen to see the list of tests
Click on a test to start
You should then be able to watch the instructions and start your vision test. For more information, you can read the articleUnder conditions should I do my tests?.