B.N.U.SBNUS Polarized Sunglasses with Corning Glass Lens - High Definition, Fashionable, and Scratch-Resistant

Does this company sell reading glasses?

I ordered B7036 and there was a little baggie with 2 white rubber pieces with a small image of sunglasses on them. What are these for?

Are the glass lens impact resistant

What dimensions are the lenses? Inches or millimeters.