The eyeglasses play a more and more significant role in our modern life today. Some fashionable people think eyeglasses make them follow the trend. Because eyeglasses are available in a wide variety now, most of which incorporate fashion. Some celebrities wear designer eyeglasses even there is no nearsightedness or farsightedness problem. Choosing the right eyeglasses is very important. Eyeglass frames are available in various materials that different people may like a specific material. Eyeglasses are truly a great invention but those who have greatly contributed in various fields would never have seen the significance of eyeglasses today. Eyeglasses have benefitted a huge amount of people who need vision correction. Without eyeglasses, their lives may be affected.
How is the development of glasses? Until now, there is still nobody knows that which particular and great person has invented eyeglasses. Some evidences from the old paintings show that the eyeglasses in the early days were quite different from ones today. In the past the original eyeglasses only had a perch on somebody’s nose without other support. This design of eyeglasses had some drawbacks. For instance, when people are doing physical movement, these eyeglasses could easily de-position. Eyeglasses frames took further step about four centuries later, and the frames were much similar to the eyeglasses nowadays. They need the support of the wearer’s ears. Modern eyeglasses are comfortable, stable and convenient. Primary eyeglasses with normal design had metal frames and quartz lenses. Flawless glasses lenses invented even later. After centuries of evolution, eyeglasses are much more comfortable and functional than those early ones. In early days, glass produced by factories often had bubbles and other imperfections. Currently, the techniques of glass production have improved significantly and glass has become indispensable for eyeglasses lenses. Today, eyeglasses are widely used for many vision problems, including normal magnification of words for reading, correction for nearsightedness and farsightedness. Among the various materials of lenses, index lenses are very thin and light. This type of lenses is particularly suitable for people with a high prescription. There are also many kinds of frame today, including plastic, metal, and titanium. Plastic frame is much more fashionable and cheap than another two types. The advantage of metal frame is durable. And today, the lighter and more durable titanium frame is widely used and become very popular.
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