Base Running 2: How to slide head first, pop up and hook slides Base Running 2: How to slide head first, pop up and hook slides

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Inadequate dark lenses are even more harmful than inadequate light lenses or wearing no sunglasses at all because they provoke the pupil to open wider. Broad temple arms protect against "stray light" entering from the sides Sunglasses with slim temple arms Protection Sunglasses offer protection against excessive exposure to light, including its visible and invisible components.

A mirrored coating can be applied to the lens. These, however, appear to have worked rather like mirrors.

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Shwoodfor example have experimented with these materials, they have even used recycled newspaper to manufacture frames. These sunglasses are used in water sports such as surfingwindsurfingkiteboardingwakeboardingkayakingjet skiingbodyboardingand water skiing.

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November Learn how and when to remove this template message Teashade sunglasses "Teashades" sometimes also called " John Lennon glasses", "Round Metal", or, occasionally, "Granny Glasses" were a type of psychedelic art wire-rim sunglasses that were often worn, usually for purely aesthetic reasons, by members of the s counterculture.

Variants Clip-on Clip-on glasses are a form of tinted glasses that can be clipped on to eyeglasses for protection from the Sun. In the basic impact test, a 1 in 2. Lenses of various colors can offer sufficient or insufficient UV protection.

Ancient documents describe the use of such crystal sunglasses by judges in ancient Chinese courts to conceal their facial expressions while questioning witnesses.

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Full frame glasses have the frame go all around the lenses. Blue blocking lenses are commonly yellow or brown, whereas blue or gray lenses cannot offer the necessary blue light protection. Aviators' association with disco culture led to a decline in their popularity by Some brands have experimented with recycled wood from objects like skateboardswhiskey barrels and baseball bats.

Some manufacturers produce special photochromic lenses that adapt to the varying light conditions when driving.

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There is often a silver piece on the corners as well. The end of the resting hook and the bridge over the nose can be textured or have rubber or plastic material to improve hold. A study reported that "Expensive brands and polarizing sunglasses do not guarantee optimal UVA protection.

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SR is a proprietary material that was introduced by Kaenon Polarized in When hook sliding into home you can hit the back corner of the plate with a real quick hand movement that can be difficult to tag.

Sports This section does not cite any sources. Mirrored lenses of different colors can expand the range of fashion styles. Glass lenses have the best optical clarity and scratch resistance, but are heavier than plastic lenses.

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Nose bridge Nose bridges provide support between the lens and the face. Europe The European standard EN In this instance you can slide to the other side of the bag and grab with your hand.

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An anti-reflection coating is recommended, and a hard coating to protect the lenses from scratches. Sunglass lenses are made of either glassplasticor SR Please help improve this section by adding citations to reliable sources.

In all cases, hiding one's eyes has implications for nonverbal communication ; this is useful in pokerand many professional poker players wear heavily tinted glasses indoors while playing, so that it is more difficult for opponents to read tells which involve eye movement and thus gain an advantage.