Visibility and clear, comfortable vision are essential for safe driving.
The best sunglasses for driving should reduce or eliminate glare, especially from light reflecting off the roadway and other flat surfaces — such as the hood of the driver's vehicle and the windshields and other reflective surfaces of other vehicles.
Polarized sunglasses offer the best glare reduction from light reflecting off these and other surfaces and are generally considered to be the best sunglasses for driving.
Other very beneficial features for driving sunglasses include a large, wraparound style that provides a wide, unobstructed field of view, and anti-reflective coating on the backside of the lenses to eliminate glare from sunlight reflecting off the inner surface of the lenses when the sun is behind you when you're driving.
Finally, consider a brown, copper or amber tint for your driving glasses, which will enhance contrast on both sunny and overcast days.