Blue Light: Fact And Fiction
Blue Light Glasses Blue light glasses are glasses with lenses that are fitted with a filter that can block or absorb some of the light which is everywhere. Some designs additionally block UV
Progressive Lenses: 3 Annoying Problems
Progressive Lenses Disadvantages Many people love progressive lenses, which have several advantages over bifocals. But they are much more expensive than single vision lenses, and your eye doctor makes more