Final Answer:
Safety glasses, face shields, or other eye and face protectors must be worn when there is a risk of eye or face injury from flying particles, molten metal, liquid chemicals, acids, or harmful light radiation.
Step-by-step explanation:
The use of safety glasses, face shields, or other eye and face protectors is crucial in environments where there is a potential risk of eye or face injury. This includes situations where there may be flying particles, molten metal, liquid chemicals, acids, or harmful light radiation. The purpose of these protective measures is to prevent eye injuries and safeguard the face from various hazards. Different work environments may require specific types of eye and face protection based on the nature of the potential hazards present.