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Glasses are simple optical devices made to correct vision or protect eyes, consisting of lenses and frames. There are four types of glasses used to correct vision: myopia glasses, farsighted glasses, reading glasses and astigmatism glasses. Other types of glasses include goggles, sunglasses, swimming goggles, etc., which provide various protection for the eyes. Glasses are not only a tool to protect the eyes, but also a beauty decoration.
In terms of the function of the lens, it has the functions of adjusting the amount of light entering the eyes, increasing vision, protecting eye safety and clinically treating eye diseases. Children with strabismus caused by refractive abnormalities and patients with refractive abnormalities accompanied by headaches can be treated by wearing glasses. As for the function of spectacle frames, in addition to supporting the lenses and constituting glasses to be worn on people's eyes, they also have beauty and decorative properties. Modern fashionistas emphasize that glasses should be in harmony with the facial makeup and clothing of people of the era, reflecting symbols of high social class, elegance, fashion, etc.