It may seem easy to pair a pair of discount eyeglasses online, but, to create a comfortable and qualified pair of glasses, one needs to choose, which is mainly reflected in the selection of lenses.

However, many customers often overlook this point when the cheapest eyeglasses online lens match, thinking that only a suitable frame is enough and that appropriate lenses are needed.

If you are planning to get eyeglasses online, how should you choose a pair of lenses that are suitable for your glasses? If you want to choose the right lens for yourself, you should first understand the corresponding lens parameters. For example, what is a refractive index? It reflects the ability of a lens to refract light.

Generally speaking, the higher the refractive index value, the thinner and more aesthetically pleasing the lens. Also, for example, what is the anti-UV function? It mainly reflects the anti-UV ability of the lens to block the wavelength of ultraviolet radiation.

For example, curvature design, which is a more professional term, is divided into spherical and nonspherical. Nonspherical lenses have small visual deformation, are easy to adapt to, and are not easy to fatigue. They are lighter and thinner than spherical lenses at the same degree, so their prices are relatively higher. 

So, after understanding these, I believe everyone will already know how to choose the right glasses for themselves when they go online for glasses matching in the future. I hope that everyone who wears glasses can choose glasses that are economical, affordable, and of guaranteed quality.