| Goggles and safety glasses are forms of | | | | chunks of metal, wood, plastic, |
| protective eyewear that usually enclose | | | | concrete, and so on from hitting or |
| or protect the eye area in order to | | | | piercing the eye. Usually has some sort |
| prevent particulates or chemicals from | | | | of ventilation to prevent sweat from |
| striking the eyes. They are used in | | | | building up inside the goggles and |
| chemistry laboratories and in | | | | fogging the surface. |
| woodworking. They are often used in snow | | | | Motorcycle riding and other open-air |
| sports as well, and in swimming. Goggles | | | | activities: Prevents insects, dust, and |
| are often worn when using power tools | | | | so on from hitting the eyes. |
| such as drills or chainsaws to prevent | | | | Laboratory: Combines impact resistance |
| flying particles from damaging the eyes. | | | | with side shields to prevent chemical |
| Many types of goggles are available as | | | | splashes reaching the eyes. May also |
| prescription goggles for those with | | | | include laser protection. |
| vision problems.Goggles can also be worn | | | | Racquetball: Protect the eyes from |
| as an accessorie or as a fashion | | | | racquets swinging in an enclosed area |
| statement. Willy Wonka goggles are are | | | | and from impact from hard rubber ball. |
| good example. They have very large | | | | Snow sports: Protect the eyes from glare |
| cirular lenses and are painted with | | | | and from icy particles flying up from |
| different patterns and designs. | | | | the ground. |
| The Inuit carved goggles from caribou | | | | Meteorology: dark adaptor goggles are |
| antler to help prevent snowblindness. | | | | used before going outside at night, in |
| The goggles were curved to fit the | | | | order to help the eyes adapt to the |
| user's face and had a large groove cut | | | | dark. |
| in the back to allow for the nose. A | | | | Basketball: Several NBA players have |
| long thin slit was cut through the | | | | worn goggles during play, including |
| goggles to allow in a small amount of | | | | Kareem Abdul-Jabbar, James Worthy, |
| light. The goggles were held to the head | | | | Horace Grant and Kurt Rambis; they |
| by a cord made of caribou sinew. | | | | prevent a fellow player from scratching |
| Most modern cold-weather goggles have | | | | or hitting the eyes when trying to grab |
| two layers of lens to prevent the | | | | the basketball. |
| interior from becoming "foggy." With | | | | A visor is a surface that protects the |
| only a single lens, the interior water | | | | eyes, such as shading them from the sun |
| vapor condenses onto the lens because | | | | or other bright light or protecting them |
| the lens is colder than the vapor. The | | | | from objects. Types of visors include:- |
| reasoning behind dual layer lens is that | | | | A type of hat consisting only of a visor |
| the inner lens will be warm while the | | | | and a way to fasten it to the head. |
| outer lens will be cold. As long as the | | | | The transparent or semi-transparent |
| temperature of the inner lens is close | | | | front part of a motorcycle crash helmet |
| to that of the interior water vapor, the | | | | Any such vertical surface on any hat or |
| vapor should not condense. However, if | | | | helmet. |
| water vapor gets between the layers of | | | | Any such horizontal surface on any hat |
| the lens, condensation can occur between | | | | or helmet (called a peak in British |
| the lenses and is almost impossible to | | | | English). |
| get rid of; thus, properly constructed | | | | The part of a helmet in a suit of armor |
| and maintained dual-layer lenses should | | | | that protects the eyes. |
| be air-tight to prevent water vapor from | | | | A device in an automobile that the |
| getting in between the lenses. | | | | driver or front passenger can lower over |
| The requirements for goggles varies | | | | part of the windshield to block the sun. |
| depending on the use. Some examples: | | | | |
| Swimming: Must be watertight to prevent | | | | A shield to protect the eyes from |
| water, such as salt water when swimming | | | | sunlight on a flight helmet, or an |
| in the ocean, from irritating the eyes | | | | American football helmet. |
| or blurring vision. Allows swimmers to | | | | Green eyeshades, formerly worn by |
| see clearly underwater. | | | | accountants and others engaged in |
| Power tools: Must be made of an | | | | vision-intensive, detail-oriented |
| unbreakable material that prevents | | | | occupations |