What is the Ishihara test?
The Ishihara test is a color vision deficiency test devised in 1917 by Japanese ophthalmologist Shinobu Ishihara. It's a simple way to check for red-green color blindness by seeing whether someone can read a number hidden within a circle made of dots in different colors.
Why isn't this a real diagnostic tool?
An actual Ishihara test needs to be performed on precisely calibrated printed plates under standardized lighting conditions to be accurate. Since color rendering on a monitor screen can vary depending on the device and its settings, please use this page for fun and as a simple reference only.
Frequently Asked Questions
I couldn't see any of the numbers. Am I colorblind?
This result alone isn't enough to say for sure. Screen brightness, monitor settings, and lighting conditions can all affect the outcome, so if you're concerned, we recommend getting a proper exam from an eye doctor.
Can color vision deficiency be treated?
Most inherited color vision deficiencies are genetic, and current medical technology can't fully cure them, but color-correcting glasses and similar aids can help with distinguishing colors in daily life.