The complex procedure involves extracting a patient’s canine tooth, adding a plastic optical lens to it and surgically ...

Here's what this number 16 looks like to someone with total colorblindness. It's much more common to have trouble telling apart shades of red and green, blue and yellow, or a mix of these.

like this version of Vincent van Gogh’s “Portrait of Dr. Gachet.” The tactile paintings work as a way to reveal art to the blind because we don’t see with just our eyes: We see with our ...