You cant trust everything a web company that sells glasses online says.

So I look at many things online when it comes to eyewear and prescription lenses. It really upsets me when companies make false claims as if they are actually opticians. 4 guys went to business school together and started a successful company online selling glasses made in china. One of the claims they make is that polycarbonate lenses are the most impact resistant lenses on the market. See the claim in the screen shot below.