In order to choose cost-effective lenses for glasses, we still need to know some basic knowledge about lenses. Wenzhou Wanrun Glasses Co., Ltd. will take you to know! We all know that lenses are the decisive factor for a suitable pair of glasses, so we should choose lenses according to our work, life needs and work environment. For example, students, drivers and doctors have high visual requirements for color and distance.





  Therefore, colorless transparent lenses should be preferred when selecting lenses. If the driver wears heavy colored glasses, he will be inaccurate or insensitive to the change of distance, which is easy to cause accidents. Refractive index refers to the ratio of the total amount of light entering the eye through the lens to the total amount of light reaching the lens. The higher the ratio, the better the optical transmission performance and the higher the definition.

  Generally speaking, the transmissivity of optical lens with multilayer antireflection film, colorless optical lens and aspheric ultra-thin optical lens is relatively good, up to 99%. This not only makes the wearer see more clearly, but also greatly improves the visual contrast and minimizes visual fatigue. The thickness of the lens is related to the diopter, the refractive index of the lens, and the shape and size of the frame. Therefore, when choosing the lens thickness, you should refer to your own myopia. If the degree is high, the high refractive index lens is preferred, so the lens thickness is relatively thin, which can also greatly reduce the pressure on the bridge of the nose.

  In addition, the weight of the lens. When it comes to weight, it must be related to the lens material. The lens materials on the market are usually glass, resin and PC. Among them, glass lens is the heaviest and PC lens is the lightest. Therefore, the thickness and weight of the lens should also be considered when selecting. Due to different working environments, the required lens performance is also different. For example, if you often face the computer, you need to prevent blue light lens; If you often fish, you need to prevent strong light. Therefore, when selecting the lens, the lens function should be considered according to the working environment.

  Whether it is required to have the functions of anti ultraviolet, anti electromagnetic radiation, high temperature resistance, oil stain resistance, acid and alkali resistance, anti dispersion, anti deformation, anti glare, etc. Only when these factors are taken into account, can a suitable lens be matched. You must choose a regular professional optician to wear glasses. The article comes from the network. If there is infringement or violation, please contact us to delete it.