Here’s an eye-opener: More than 10 million Americans have red-green color blindness, a condition that makes driving, shopping and other everyday tasks challenging. But many don’t realize they are colorblind. What’s more, colorblind children are frequently misdiagnosed with learning disabilities. Often overlooked or misunderstood, color blindness can now be identified with an online test at or by downloading EnChroma’s Color Blindness Test app (free) to your smartphone or tablet.