In this day and age there is no need to expose yourself to the risk of glass being embedded in your eye. In Oz we have a standard for industrial eye ware, AS1337. In the U.S. it will be ANSI Z87.1. Let that be your guide

You can have polycarbonate cut to your prescription, in most cases. you've got two types what Ladisney is referring to is toughened where the glass fractures and you end up with lots of little cubes of glass. Then you've got laminated glass, when that goes you get the sheet on the other side of the impact fracturing. Both types of glass result in shards or splinters that can harm you. It can come down to luck, I've been through a large plate glass window without a scratch ...another story

I wear polycarbonate.


...yes, that is a single seat...no, I will not put the other seat on...yes, I am selfish...yes, you should buy your own bike