Test for Colour Blindness

Dr Shinobu Ishihara introduced in 1917—almost 100 years ago—the most well known color blindness test. Each of his tests consists of a set of colored dotted plates, each of them showing either a number or a path. Since then this is the most widely used color vision deficiency test and still used by most optometrists and ophthalmologists all around the world.
Ishihara Color Test Instructions:
1. Sit approximately 75cm from your monitor, with each circle set at eye level.
2. Preferably have mild natural light and no glare on your screen. Interior lights and glare can alter the color of the pictures.
3. Attempt to identify the hidden number or line within 5 seconds.
4. Share the test with your friends!

Видео Test for Colour Blindness канала NIK DIGITAL MEDIA