Final answer:
Safety glasses protect against (c) 90% of all eye hazards. Protective eyewear is essential in preventing eye injuries and UV exposure, which can contribute to cataract formation. Plastic lenses offer better UV protection than glass lenses.
Step-by-step explanation:
Safety glasses are designed to protect the eyes from various hazards. When it comes to protecting against eye injuries, the correct answer to the question is that safety glasses protect against 90% of all eye hazards. It's important to choose the right type of protective eyewear depending on the activity or work environment since hazards can vary.
In terms of UV protection, it's worth noting that repeated exposure to UV-B radiation can contribute to the development of cataracts, which are responsible for a significant percentage of blindness cases. Given this, full coverage eye protection that blocks UV radiation is essential, and plastic lenses, such as those made from polycarbonate, are more effective in protecting against UV compared to glass lenses. Moreover, using sunglasses that filter out UV rays can also help protect eyes from potential harm caused by sunlight.