General Safety Requirements

The affected employee must use eye protection that provides side
protection when there is a hazard from flying objects.  Detachable side
protectors (e.g., clip-on or slide-on side shields) that meet all the ANSI
Z-87 performance standards that the permanent side shields meet, are
acceptable.

• The employee who wears prescription lenses while engaged in
  operations that involve eye hazards must wear eye protection that
  incorporates the prescription in its design, or wears eye protection that
  can be worn over the prescription lenses without disturbing the proper
  position of the prescription lenses or the protective lenses.
• Eye and face personal protective equipment must be distinctly marked
  to facilitate identification of the manufacturer and meets the American
  National Standards Institute (ANSI) code Z87.1.
• The employee must use equipment with filter lenses that have a shade
  number appropriate for the work being performed from protection
  from injurious light radiation (e.g., sunlight, lasers).
• Employees who work in a laboratory with potential eye hazards should
  always wear protective eyewear.  There are several different options
  for eye protection.