How can i prevent eye injuries in my workshop?

Eye protection!: Wear safety glasses, goggles, or face shields when you hammer nails or metal, work with power tools or chemicals, or do any activity that might cause a burn to your eyes. If you work with hazardous chemicals that could splash into your eyes, know how to flush chemicals out, and know the location of the nearest shower or sink.

Hierarchy of Control: While safety glasses, goggles, shields, etc. Are useful, they are only personal protective equipment. Engineering out the risk with lexan guards around grinders and so forth, and administratively barring persons with one eye from working in the shop are strong approaches. Additionally, consider providing prescription safety glasses, since better visual function incentivizes spectacle wear.

Multiple steps: The approach to reducing exposure to work hazards is step-wise. The first step is to engineer out hazards. Once that is maximized use administrative controls to reduce exposure, the last step is to use protective clothing/equipment to protect against any hazards left.