Final answer:
The most common type of eye protection is safety goggles marked with "z87.1". Safety goggles provide full coverage and protect against UV radiation. Plastic lenses, especially polycarbonate lenses, offer the most protection.
Step-by-step explanation:
The most common type of eye protection is safety goggles, which must be marked with "z87.1" on the lens and frame. Safety goggles provide full coverage for the eyes, protecting them from ultraviolet (UV) radiation. They are especially useful for those who are working with or exposed to UV radiation.
Ordinary glasses give some level of protection, but plastic lenses, particularly polycarbonate lenses, provide the most protection against UV radiation. Additionally, contact lenses can help protect the retina by absorbing UV radiation.