How to choose reading glasses lenses?_industry news_
From the perspective of the current market, reading glasses lenses also have many functions. For the choice of lenses, in addition to considering the factors of degree, the impact of other functions of the lens on life and the material of the lens are some elderly friends. The question that will also be considered, how to choose reading glasses lenses, is also a topic of concern. Let's take a look at how to choose reading glasses lenses. From the perspective of the types of lenses, there are mainly single vision lenses, bifocal lenses and progressive multifocal lenses, which are also the most widely used types of lenses at present. Single-vision lenses have relatively simple functions, that is, the entire lens is only suitable for viewing close-up scenes, and the picture is particularly clear. But the limitation is that it is not suitable for seeing far, so it is suitable for those who often need to see close. Because bifocal lenses are composed of a flat lens in the upper half and a presbyopic lens in the lower half, a pair of presbyopic lenses is suitable for seeing far and near at the same time, with a wider field of vision. The optical performance of this lens is relatively stable, and there is a dividing line in the middle of the lens. The shortcoming is that it is blurry in the middle distance, needs an adaptation period, and there are obvious intervals between different areas, and the appearance is not very beautiful. Progressive multifocal presbyopic lenses are suitable for seeing near, middle and far areas. One pair of lenses can meet the needs of seeing different areas. However, because there are many people who are not suitable for progressive multifocal glasses, there are also limitations. In addition, those who wear progressive multifocal reading glasses also need to have strong adaptability. Progressive multifocal presbyopic lenses are suitable for those who need to alternate between distance, intermediate and near vision. The brand of progressive multifocal lenses is suitable for those who need progressive multifocal lenses, and the brand lenses are excellent both in terms of lens performance and use. From the perspective of lens material, resin and PC material are more popular for reading glasses. The lens has the characteristics of light weight, impact resistance and not easy to break. The specific choice depends on the actual situation of the individual.