50 Men's Square Reading Glasses in Black by Foster Grant - Tristan Pop of Power® Bifocal Style Readers - +1. And the whole lens helps to filter blue-violet light* from the sun and artificial sources, including digital devices produced by computers and other artificial and natural sources, including the sun.
Each lens features a magnified reader segment at the bottom; the rest of the lens is unmagnified. Spring hinges make these glasses comfortable to wear for just a few minutes or all day.
So, you can keep your glasses on—and your vision clear—when you shift between reading and looking up to see across the room or interact with others. - Men's Square Reading Glasses in Black by Foster Grant - Tristan Pop of Power® Bifocal Style Readers - +1.50 Tristan Pop of Power® Bifocal** Style reading glasses pair a classic look with innovative lens technology. And the whole lens helps to filter blue-violet light* from the sun and artificial sources, including digital devices produced by computers and other artificial and natural sources, including the sun.