Meso-zeaxanthin is a form of zeaxanthin that's predominantly found in the direct center of the macula. Zeaxanthin, lutein, and meso-zeaxanthin together form macular pigment, the natural blue light filter and antioxidant present in the retina. Macular pigment is generally depleted in people with normal diets. Therefore, it is a good idea to consider taking an eye supplement that contains all three macular pigment carotenoids.