After choosing the frame the second most important step is to know what is the best material for your lenses. In the world of optics there are a variety of lens material choices but a few of them are the most commonly used and those are the ones we will focus on. These most commonly used materials are as follows:
Each one of these types of materials have their own pros and cons and depending on your prescription needs and your frame choice one material is abetter choice than the other one.
CR-39 – Most commonly used material for eyeglasses lenses. It is perfect for basic metal and plastic frames. Has great clarity when looking through it, can be treated with an anti scratch coating (to reduce abrasion), U.V. protective coating can be added, as well as it can be tinted easily. If you have a standard type of frame and a week to mild prescription this would be the best lens to pick.
Polycarbonate – Durable impact resistant lens (currently used in the windshield of the space shuttle), is the lightest material available and is naturally 99% U.V. resistant. This material is great for semi-rimless and full rimless (frames where the lenses need to be drilled throu