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 ...

You may have seen them at your ophthalmologist's office: large circular diagrams made up of colored dots. People with normal vision are able to discern a number among the dots of contrasting colors.

(WITI) -- It's a simple question that drove the internet BONKERS last week -- even dividing the internet: "What color is this dress?" Now, there's another, more complicated question: "How can two ...