The development of sunglasses

With the trend of individuation, fashion, brand and upscale of glasses consumption becoming more and more obvious, glasses have already been given more functions. According to the insiders, new sunglasses are coming into the market almost every month. Nowadays, there are more and more styles of sunglasses, and the prices vary. So how did Sunglasses develop into the current prosperity.

In the middle of the 19th century, the earliest real sunglasses were born in the West. Although the technology at that time was far less developed than it is now, and the lenses are usually made of colored amber or mica that can be collected in nature, and the frames are also quite heavy, its appearance is still loved by professionals. With the protection of skiers and long-term explorers, they can no longer worry about their eyes being hurt by the sun.

It wasn't until the 20th century that people got into the habit of wearing sunglasses. In the United States, the military has played an important role in promoting the development of sunscreen products. Omit sunglasses manufacturing technology, they are also at the forefront. In 1930, the U.S. Army Aviation forces commissioned the optical instrument factory of the company to manufacture a batch of high-quality glasses to protect the eyes of pilots from high-altitude glare.

The company's physicists and opticians have developed a special dark green lens that can absorb the yellow light in the spectrum. To maximize the visibility of the pilot, they also designed a downward curved frame, because the pilot always kept looking at the dashboard below.

Pilots get free Sunglasses first. Soon, ordinary people will be able to buy the same sunglasses for ray ban pilots. In the 1960s, foster grant, which makes combs and glasses, launched a series of advertising campaigns to make sunglasses a fashionable piece.

With the coming of summer, more and more consumers choose sunglasses and nearsighted glasses. To let people buy a pair of glasses with qualified quality and comfortable wearing, experts remind consumers to pay attention to many aspects when choosing glasses.

It must be able to filter more than 99% of the ultraviolet light in the sun. Moreover, the function of blocking strong light, especially the dark lenses, can not cause "parallax" and "color difference". "Parallax" refers to the misjudgment of walking, twisting and going up and down stairs after wearing glasses. When the "color difference" is serious, the red light and green light will not be clear, causing danger. The surface treatment, refraction, curvature and safety enhancement degree of the lenses are also important factors for eye care and protection of the sunglasses.

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