A color vision test, also known as the Ishihara color test, measures your ability to tell the difference among colors. If you don’t pass this test, you may have poor color vision, or your doctor may ...

Do you have a hunch that you don’t see colors as clearly you should? Ever been told that something has different shades, but they all look the same to you? If so, you could be color blind. Some people ...

Online color blindness tests may give people an idea of whether they may be color blind and if so, which type of color blindness they might have. This information comes from the National Eye Institute ...

The article on improving vision (23 May, p 33) reminded me of spending two years in my early 20s matching colours in a laboratory. At the medical before my next job, to doctors’ surprise I could read ...