What does it mean when sunglasses are mirrored?

[Elm Grove]

I saw there are mirrored sunglasses online. But what does it mean when sunglasses are mirrored?

[Elm Mott]

Mirrored sunglasses are type of sunglasses with a reflective optical coating on the outside of the lenses. The coating make the sunglasses lenses look like a mirrors from outsides. This is why they are known as mirrored sunglasses. And the mirrored sunglasses are not just for looks, but also can protect the eyes from UV rays and glares. So, they sunglasses are suitable to wear in the condition of sand, water, snow and higher altitudes.

[Elm Springs]

The mirrored sunglasses may be looked reflective from outside. From the inside part of this type of glass, you may see the grey outside. And this type of glass is mostly suitable in the beach, sand and other places to decrease the coming strong sunlight. In addition, the mirrored sunglasses can own different color of lenses to show the beauty.