7.How It’s Diagnosed
The main way to tell if someone’s colorblind is the Ishihara color test. It uses images of dots in many colors. If you see color correctly, you’ll spot a number or some other shape in each image. If you’re colorblind, you won’t be able to. You can get the test to use on yourself, but an eye doctor can do it better.
8.Living With It: Gadgets
Apps for your cellphone or tablet computer can tell you what color something is. You take a photo, and when you tap on a place in the image, the app tells you the color. Some apps can even tell shades of colors. If you have red-green colorblindness, special lenses may let you see colors more clearly, although their effectiveness is widely controversial. For instance, special lenses to correct for color deficiency are not permitted for pilots.
