Always wear safety glasses when there a chance of danger to your eyes!
When completing demo work, sawing, working above your head, or any situation that could possibly lead to eye danger
Use Z87 rated safety glasses.
3 steps to eye safety:
1st step- recognize eye dangers in your work area
2nd step - use appropriate eye protection
3rd step - Always make sure safety glasses are clean and free from scratches or damage if any of these are present replace eye protection