These sunglasses are equipped with unique polarizing lenses from Polaroid. While ordinary lenses merely darken the view, only polarizing lenses block irritating glare. The glare-free vision provided by Polaroid Polarized sunglasses guarantees high optical comfort and, as a result, increased safety.

 

The lenses also contain a highly efficient UV-filter that offers complete protection from harmful UV-rays up to 400 nanometres.

 

What do the filter categories on sunglasses mean?

 

There are five filter categories.

Cat 0 - clear or very light tint

Cat 1 - light tint

Cat 2 - medium

Cat 3 - dark - The most popular filter category because it works well for all sports and in cloudy or sunny conditions.

Cat 4 - very dark - Filters out more light, so good for very bright days.

 

The number is a reference to the tint of the lenses. It does not affect the UV filter or polarization. Categories 1 and 2 (Cat 1 and Cat 2) are better for low light conditions, i.e. morning and evening. Most sunglasses are category 3 and work well in full sunlight. Category 4 is not recommended for driving.

 

Which sunglasses are recommended for driving?

 

When you?re driving, polarized sunglasses eliminate the glare that reflects off flat surfaces and interferes with vision. Polarized lenses in bronze, copper and brown are ideal. These colours absorb blue light that the human eye finds difficult and uncomfortable to use. They also make it easier to see traffic and brake lights. For all around use, filter category 4 works well.