Gozo Sunglasses

1. MAKE IT 100%
The single most important thing to look for when buying sunglasses to protect your eyes is a sticker or label indicating that they block 100 percent of UV rays.

What exactly are UV rays?

Ultraviolet (UV) rays are located just past the violet portion of the visible light spectrum; sunlight is the main source.

UV light is broken into three different types: UVA, UVB and UVC.

UVA has longer wavelengths and passes through glass easily; experts disagree about whether or not UVA damages the eyes.
UVB rays are the most dangerous, making sunglasses and sunscreen a must; they don't go through glass.
UVC rays do not reach the Earth because its atmosphere blocks them.

Look for sunglasses that protect you from 99 to 100 percent of both UVA and UVB light. This includes those labeled as "UV 400," which blocks all light rays with wavelengths up to 400 nanometers. (This covers all of UVA and UVB rays.)