Which material is typically NOT suitable for effective eye protection?

Ordinary prescription lenses are typically not suitable for effective eye protection in hazardous environments. While they may correct vision, they often lack the necessary impact resistance and protective features that specialized eyewear provides. Features such as shatter resistance, additional coverage, and anti-fog capabilities are critical in safety eyewear but are generally not present in standard prescription lenses. Safety goggles and face shields are specifically designed for eye protection, offering additional barriers against potential hazards. Polycarbonate lenses are known for their high impact resistance and are commonly used in safety eyewear, making them suitable choices for effective eye protection.