What Does Side Shields for Glasses Mean?
Side shields are items of personal protective equipment (PPE) that are designed to reduce the chances of unwanted flying debris getting to the eyes through the gaps on the outermost sides of safety glasses.
Some safety shields are built into the safety glasses, while others can be bought separately and attached to a pair of glasses.
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Safeopedia Explains Side Shields for Glasses
The Occupational Safety and Health Administration (OSHA) provides established standards for the use of side shields of any variety, including when they are required and what variety is suited to a particular activity or workplace. Varieties that are permanently attached are generally provide a higher level of safety than those that are detachable.
Some side shields are tinted or polarized to match the lens of the sunglasses they are attached to. This prevents unfiltered light from reaching the eyes through the large side gaps in the glasses. These side shields improve the effect of polarized lenses in glasses.