What is Hi-Index Lenses?

What are Hi-Index lenses?

• Your lens index is a number that describes how thick or thin your lenses are. The higher a lens' index is, the thinner it becomes. Higher prescriptions require higher index lenses.
• High-index eyeglass lenses are the right choice if you want thinner, lighter lenses and eyeglasses that are as attractive and comfortable as possible.
• Thinner, lighter high-index lenses are especially recommended if you have a strong eyeglass prescription for near-sightedness, far-sightedness or astigmatism. High-index lenses can make your eyeglasses noticeably slimmer, lighter and more attractive regardless of how strong your prescription is.
• Thinner edges. Because of their ability to bend light more efficiently, high-index lenses for near-sightedness have thinner edges than lenses with the same prescription strength that are made of conventional plastic material.
• Lighter. Thinner edges require less lens material, which reduces the overall weight of the lens. Lenses made of high-index plastic are lighter than the same lenses made in conventional plastic, so they're more comfortable to wear.