The relationship between lens thickness and refractive index_lens knowledge
Now with the development of science and technology, many people wear glasses not only in professional glasses store, but also online, but they are all worried about a problem, that is, whether the thickness of the lens will affect the normal observation of vision, Is there any relationship between thickness and refractive index? Is the lens with a higher refractive index thicker, or the lens with a higher refractive index, thinner? Today, let's take a look at the relationship between lens thickness and refractive index. The relationship between the thickness of the lens and the refractive index? The thickness of the lens will directly affect the health of our glasses. When choosing glasses, we must pay attention to the selection of lenses, not blindly sloppy. It has always been believed that lenses with a higher refractive index will produce thinner, lighter, more beautiful, and even more expensive lenses. In fact, this interpretation is unreasonable. If you have to say this, you must Consider the following points: 1. What material is the lens made of, because the material is different, the refractive index of the lens will be different, and the thickness of the lens will also be different, such as resin lens and glass The lens thickness of the lens is not the same, of course, the refractive index will also be different. 2. But the thickness of the lens is not only determined by the refractive index alone, a big factor is also related to the degree of the eye. If your degree of myopia is higher, the refractive index of the lens will be smaller, and the thickness of the lens will be relatively The thicker the glasses are, if only the refractive index is considered, the glasses that come out may be beautiful, but may affect the normal state of vision. 3. In addition to the degree and refractive index of the glasses, the size of the pupil of the glasses should also be considered, which also directly affects the thickness of the glasses you match, because under normal circumstances, the larger the interpupillary distance, the larger the selected glasses frame. The smaller the lens, the thinner the lens will be. 4. The thickness of the lens is also related to the size of the spectacle frame, because when people choose glasses now, it is not just to correct vision, but also for aesthetics. If you choose a larger spectacle frame, the lens should be If the center moves inward, the periphery of the lens will be larger and the lens will be thicker. To sum up: the factor affecting the thickness of the lens is not only the refractive index, but also the degree and size of the glasses. Although the higher the refractive index, the thinner the lens will be, but when you wear glasses, you have to determine the degree of myopia of your eyes, or the size of the spectacle frame, because both of them also directly affect the thickness of the lens. direct factor. Finally, the senior optometrist of OULE glasses network tells everyone that you must be careful and careful when matching glasses, and you must learn to spend the least money to get the best and most suitable glasses.