Pad Arms:
These hold the nose pads in place, but still allow adjustments to help the pads better conform to your nose.
Peripheral Vision:
The edges of your visual field.
Polarized Lenses:
Lenses with a special coating that increase visibility by filtering out horizontally-reflected glare. While useful for everyone, polarized lenses are especially beneficial for senior citizens, diabetics, those with sensitive eyes, or anyone who spends hours in the sun or snow. Teens and children under 18 should also jump on the polarized lens trend to protect their eyes.
Polycarbonate:
An extremely strong plastic used for sunglass frames that weighs little and is impact-resistant, making it an ideal selection for those who need a tough and rugged style.