Page 195 - PowerPoint 演示文稿

Safety Lenses 185

Fig. 12.9: Side shield spectacle frame

Goggles

The goggles can be made either cup type or box type for eye protection
purpose. The cup type may be used to provide protection against molten
metal, flying particles, dust etc. Box type goggles give a good fit around
the brows and cheeks. They can also be worn over prescription
spectacles.

Face Shields

Face shields are usually head band supported visors that cover the face
and neck. They are used to provide protection from flying particles, molten
metal and chemical splashes and can easily be worn over prescription
spectacles, if required. They provide excellent field of view. Face shields
are usually made either from polycarbonate or cellulose acetate.

Fig. 12.10: Face shields