What factors affect the selection of discount prescription glasses lenses, such as lens material, coating type, refractive index, transmittance, strength, hardness, etc?

The material of the lens will essentially determine a series of parameters of the lens, so it can be considered as the first step in lens selection. Choosing the film layer of the lens is like adding a buff to the glasses. The resin film with poor wear resistance is coated with a hard film.

If the transmittance is not enough, add an anti-reflective film. There are many types of films, such as reflective film, filter film, polarizing film, protective film, electric heating film, and so on. There are also some additional waterproof films, anti-blue light films, etc. that can be added according to personal needs.

Most eyeglass lenses on the eyeglass mart now have several layers of film added, after all, there is not too much buff. The refractive index affects the thickness and aesthetics of the lens, while the Abbe number affects the clarity of the imaging.

In theory, it is not easy to have both. Of course, due to the continuous advancement of technology, many cheap eyeglasses near me lens manufacturers are also constantly improving the Abbe number at a reasonable refractive index. It can enhance the visual experience to a certain extent, but it is still not possible to achieve perfect balance.

When choosing lenses, it is recommended to consider a compromise between these two parameters. You may not consider so many other parameters, such as hardness determining wear resistance, strength determining impact resistance, UV absorption ability, radiation resistance, and so on.