High index lenses can be made of a variety of plastic and glass materials. High index plastic is a plastic material that is denser than standard plastic or polycarbonate. High index glass is similar in that it’s made of a glass material that is denser than crown glass. The increase in density results in the […]

Like most lens materials, high index lenses can be made with prism and, as would be expected, the lenses are thinner than standard lens materials. High Index Lenses with Prism There are positives and negatives to getting high index lenses with prism correction. The pluses are the lenses’ thinness, lightness, and looks. The downsides are […]

When most of us think about high index lenses, we automatically assume that they’re better than the “standard” or “low index” lenses at the eye doctor’s office. Advantages of Low Index over High Index Lenses These standard lenses, though, are sold to a large portion of eyeglasses wearers worldwide, and they’re worn in all sorts […]

The high index of a lens is connected to most of the qualities worth considering when shopping for a lens material. Reflections, Density, and Index Index of refraction, Abbe number (and optical clarity), amount of glare, thinness, weight, scratch resistance, and overall aesthetics are all tied to the lens’s index. If you are shopping for […]

Abbe number is a very important and often-overlooked lens quality that is particularly relevant for high index plastic lenses. Abbe Number and Color Aberration A general rule of thumb when it comes to lens materials is the higher the index, the denser the lens. As lenses become denser and more efficient at bending light (which […]

People who have heard of high index glass and high index plastic lens materials may wonder which is better for them. Each material has its strengths and its weaknesses, and what may be right for one person will not be right for everybody. If you are deciding between high index glass and high index plastic […]

High index lenses are intended to help make your lenses thinner, and double concave and double convex high index lenses are designed to make your lenses even thinner still. Most lenses are made using a “lens blank” with a set curvature on the front, which is generally either convex or flat. When the prescription is […]

Some people with strong prescriptions also need safety eye-wear or are interested in getting lenses that are impact resistant to protect their eyes better during work or hobbies. Many of these people may prefer high index lenses, which raises the question: The answer, simply, is no, they are not. Polycarbonate High Index is the most impact-resistant […]

Most high index lenses are aspheric, but what is an aspheric high index lens? Aspheric high index lenses have a complex front curvature that changes as you move across the lens, allowing the lens to be thinner and the glasses to look more attractive. Aspheric lenses are the opposite of spheric lenses, which are more […]