The eye uses a lens to focus light on the retina at its back. It needs to do this because the iris is a circle rather than a tiny hole, so a circle of light enters the eye. All of the light from each ...

Progressive lenses can feel like the “mystery box” of eyewear, we know they’re supposed to make life easier, but with so many ...

Eyeglasses come in a variety of types. This includes a single-vision lens with one power or strength over the entire lens, or a bifocal or trifocal lens with multiple strengths over the entire lens.