This colour blind test can help users detect if they have a form of CVD. It provides a variety of images and asks users to identify numerals in patterns that test various types of colour deficiency.
The main three types are protanopia (insensitivity to red light), deuteranopia (insensitivity to green light) or tritanopia (insensitivity to blue light). Colour blindness can vary in it’s severity, with some only seeing a few colours different and others – in very rare cases – only seeing black and white.
Due to the difference in colour perception on-screen compared to in-person, accurate results cannot be fully guaranteed. If this test leads you to believe that you might have a degree of colour blindness, you should see a licensed optician for a formal diagnosis.