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 ...

Our ability to see with color vision depends on the presence and function of light-sensing pigments in the cones of our eyes. Color blindness, or color vision deficiency, happens when one or more of ...

Also known as color deficiency, color blindness is when you can’t see colors as most other people do. You may have a hard time differentiating between certain colors, such as shades of red and green ...