Medical journalist Michael Mosley discussed his vision problems and experiences with nutritional intervention in an episode of the BBC program "Trust Me, I'm a Doctor."1 The shape and length of your eyeballs, and the thickness of your eye lens, affect your ability to see things close-up and at a distance. Your retina, located at the back of your eye, also contains light-sensitive cells that are critical for good vision. Your macula ?" the part of your retina responsible for central vision ?" is protected by a yellow pigment made up of lutein, zeaxanthin and meso-zeaxanthin. These compounds absorb light and protect your macula from blue light and ultraviolet (UV) light from the sun and other light sources.2