These are the only sunglasses you need. They can be worn over your prescription glasses, reading glasses or by themselves. They block the UVA and UVB rays and a large percentage of annoying bluelight. Plus, the polarized lenses are designed to eliminate glare. By design the brow bar touches or comes very close to touching your forehead; sides of the sunglasses encapsulate the corners of your
eyes; and the undercarriage blocks light from reaching your cheeks and under your eyes controlling the amount of light that reaches your eyes so they don't have constantly dilate and adjust to fluctuating light variances. In other words, your eyes won't tire as quickly. The temple's flexible wire core allows you to shape them to be the most comfortable sunglasses you've ever owned.
Note: The correct size is the smallest model that will comfortably and completely envelop your prescription eyewear. Always keep the sunglasses in the protective case when not in use. Although the Polare lenses are scratch resistant, nothing is scratch proof!