Aspheric Explained. Traditional lenses have a bulgy, curved shape. Imagine the spherical surface of a ball. Aspheric lenses are designed with less curvature than their traditional counterparts. Think flatter and thinner. In both far and nearsighted prescriptions, aspheric lenses provide a slimmer profile and minimize eye distortion without compromising optical quality.
Bifocals can cause headaches and even dizziness in some users. Acclimation to the small field of view offered by the reading segment of bifocals can take some time, as the user learns to move either the head or the reading material rather than the eyes.
But high-index lenses can make your eyeglasses noticeably slimmer, lighter and more attractive regardless of how strong your prescription is. Most eyeglass wearers are nearsighted, which requires corrective lenses that are thin in the center but thicker at the edge of the lens.
What is a photochromic lens? Invented in the 1960s by Corning Glass Works Inc, a photochromic lense is a lens that changes color when exposed to light. The term photochromic comes from the combination of the Greek word roots for light, photo, and color, chroma.
Polycarbonate Lenses. Polycarbonate was developed in the 1970s for aerospace applications, and is currently used for the helmet visors of astronauts and for space shuttle windshields. Eyeglass lenses made of polycarbonate were introduced in the early 1980s in response to a demand for lightweight, impact-resistant lenses.
progressive lenses simplify your life There are many types of progressive lenses depending on your vision needs. Look for lenses like the LC HD Enhanced View Progressive to give you edge-to-edge clarity and optimize your prescription from the optical center to the edges of the lens.