Test Preparation
Set your screen brightness to 100%.
Disable display filters
(such as night mode, blue light filter, or any colour corrections)
Do not wear any tinted lenses during the test
Avoid direct sunlight or too much artificial light
The best place is a shaded corner of the room
Your task
Try to spot the small square with different colours.
If you can’t see it, simply tap anywhere.
The test takes just 2 minutes.