How to Know If Your Sunglasses Are Polarized

There are unscrupulous eyewear manufacturers out there who claim their lenses are polarized when, in fact, they really are not! How can you know for certain whether or not your sunglasses are polarized, and why is it important to be sure?

There are unscrupulous eyewear manufacturers out there who claim their lenses are polarized when, in fact, they really are not! How can you know for certain whether or not your sunglasses are polarized, and why is it important to be sure?