Glasses

Ah, that's why he said look at the little green light why he did his, er, thing.

I have worn glasses for quite a few years, when ever I get new ones there are two things I get done to the lenses:

1. I have the lenses treated with a UV coating helps to prevent cataracts
2. I have the lenses hardened even the light weight plastic lenses I have been using for the last few years I get them toughened. never know when one will get poked in the eye with a blunt stick.
3. I have magnetic stick on polarised lenses that are held in place with small magnets in the spectacle frame

When I turn I wear a face shield to protect my face and glasses. A bit belt and braces approach but I only have two eyes :D

I always wear safety glasses every time I'm doing some stuff in my workshop.