How about photochromic lenses?_Lens Knowledge

With the improvement of people's living standards, the requirements for many things are getting higher and higher. For example, with glasses, it was originally just to correct vision and improve the rhythm of life. But what is different now is that besides correcting vision, people wear myopia glasses most to decorate themselves, and then highlight their own personality and style. In order to meet the needs of most consumers, photochromic lenses were born out of thin air. How about photochromic myopia lenses? Let's take a look at it together. Photochromic lenses are also called photochromic lenses, or 'chromic lenses' for short. They are new types of lenses that change color with the intensity of sunlight. Under normal circumstances, gray, tea, red, blue and other colors are the main colors to change. Among them, gray is the most frequently used color, because gray is a medium color, the color of objects seen through the lens is relatively dim, and it does not affect the original color, which can play a good role in shading. In the current market, when the color of the color-changing film encounters sunlight, it can only be grayed or discolored. The color-changing myopia lens will only change color when it encounters the ultraviolet rays of the sun, that is, UV, if the ultraviolet rays are stronger. The more obvious the effect of discoloration, if there is no ultraviolet light, it will not change color. For example, if the windows are closed when driving, the principle of discoloration will not occur if the sunlight cannot enter. At present, there are two main ways to make photochromic myopia lenses on the market. The better one generally adds photosensitive particles into the monomer of the lens. But every time it encounters sunlight, the photosensitive particles will decrease, and finally until the photosensitive particles are used up, there will be no more discoloration. Therefore, it is generally believed that the quality and service life of color-changing myopia lenses depend on the length of time and the speed of color change in the UV environment. Generally speaking, the service life of photochromic lenses is 2 to 3 years. When matching color-changing myopia lenses, pay attention to the degree of myopia within 400 degrees, check the speed of discoloration and see if the discoloration is uniform. Only in this way can the quality of the photochromic lenses be guaranteed, and the wearer can be provided with corrected vision and a stylish, noble and individual experience.