Analysis by Dr. Joseph Mercola
January 13, 2023
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
Lutein, zeaxanthin and meso-zeaxanthin are plant compounds with potent antioxidant capacities. Your body cannot make them, so you must get them from your diet. As noted by the BBC:3
"Lutein and zeaxanthin are found commonly in dark green leafy veg and veggies like bell peppers … and saffron. Meso-zeaxanthin is generally not found in plants — it is thought to be made in our bodies from lutein (although it is also present in some fish …) These pigments, once we eat them, appear to be important in our vision and in helping keep the macula healthy."
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