According to OSHA regulations on eyewear, it is the responsibility of the owner or employer of the company to investigate, and guarantee that employees comply with OSHA regulations. The full details of the rules are described in the OSHA regulation 29 CFR 1910.133.
29 CFR 1910.133 (a)(1) states the hazards to the eye, such as chemical gases, acid, or light radiation.
29 CFR 1910.133 (a)(2) is more specific and describes regulation to enforce employees with eye prescriptions be given prescription safety glasses.
The rest of the 29 CFR 1910.133 regulations address compliance with ANSI Z89.1-1989 - “American National Standard Practice For Occupational and Educational Eye and Face Protection.”