Part C _______________________

This item is a form of protective eyewear that usually protects the eye area in order to prevent particulates, infectious fluids, or chemicals from striking the eyes. They are used in chemistry (20) __________ and in woodworking. They are often (21) __________ in snow sports as well, and in swimming. For example, when swimming, goggles protect the eyes against (22) __________. Goggles are often worn when using power (23) __________ such as drills or chainsaws to prevent flying particles from damaging the eyes.

There are different (24) __________ of goggles. The requirements for goggles depend on their type and the way they are used. For example:

- goggles for cold weather must have two layers of lens to prevent the interior (25) __________ becoming "foggy";

- goggles for swimming must be watertight to prevent water (such as salt water when swimming in the ocean, or chlorinated water when swimming in a pool) from irritating the (26)__________. They must allow swimmers to see clearly underwater;

- goggles for tools must be made of an unbreakable (27) __________ that prevents chunks of metal, wood, plastic from hitting the eye;

- goggles for welding must be made of an unbreakable material to protect the eyes from glare and flying sparks and hot metal splashes while using;

- goggles for motorcycle riding and other open-air activities must prevent insects, dust, and so on from hitting the eyes;

- goggles for laboratory and research must combine impact resistance with side shields to prevent chemical splashes reach the eyes. May also include laser protection;

- goggles for winter sports must (28) __________ the eyes from glare and from icy particles flying up from the (29) __________.

- goggles for astronomy and meteorology must be dark to be used before going outside at night, in order to help the eyes (30) __________ to the dark.