Glasses Glasses have become an indispensible accessories in our daily lives. Most of people used them for vision correction. One who is nearsighted can wear glasses with concave lens to make his vision clear. And one with far-sightedness uses glasses with convex lens for correction. Later, other kinds of glases, such as sunglasses or goggles, had been created to protect our eyes. They are made of specialized materials which make them different from ordinary glasses. There may also be some coating in the surface of these glasses to lessen the penetration of radiation into our eyes. Recently, some people, especially teenagers, use glasses as an accessory in their clothing. They change different glasses in different occasions. Glasses have become viewed as something that can show their own styles. -- 写得不好 还请包涵 囧rz --

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