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Step 1
Polarized Lenses - When driving, you are often confronted with glare from reflected light. Light reflected from smooth flat surfaces, such as roadways or even the hood of a car, is horizontally polarized. Such glare is obnoxious and dangerous. Polarized sunglasses lenses work to cancel out this horizontally polarized light
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Step 2
Mirrored Lenses - Mirrored lenses reduce glare by reflecting light from the lens surface. Some mirrored lenses actually look reflective (think of the aviators Tom Cruise wore in Top Gun) while some function like a mirror but are transparent.
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Step 3
Impact Resistant Lenses - This is especially important if you drive a convertible, drive with your windows down, or drive a motorcycle. There is always the risk of being pelted with some sort of debris while driving. This debris could be precipitation, insects, or even kickback from other vehicles such as gravel or litter. Impact resistant sunglasses lenses protect your eyes not only from glare, but from foreign objects.
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Step 4
UV Protection - While glare from sunlight can be irritating, UV radiation from sunlight can actually be dangerous to your health. Make sure that the lenses in your driving sunglasses offer 100% UV radiation protection.
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Step 5
Comfort - The less distractions you have while driving the more enjoyable and safe your drive will be. Taking the time to pick out sunglasses frames that fit well mean that you won't be distracted by frames that slip, pinch, or are otherwise uncomfortable.
