Safety glasses can be required for many reasons:
1. A company safety standard policy.
2. Personnel are working around machinery or hand tools, air born particles, etc.
3. I'm certain the OSHA manual can give you more information on when where what type are required.
4. There has been more than one forklift operator that has had a metal flake in his eye from the mast channels or rollers.
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.