Which kind of glasses is good

summary

If you want to know which kind of lens is better for myopia glasses, we must first understand which kinds of lenses are available. Lenses can be divided into glass, resin, crystal and PC. Among them, resin lens is the most widely used, and its price is relatively acceptable. PC lens is the safest lens, but because of its high price, not many people use it. The price of glass sheet is relatively low, and it is mostly used for presbyopic glasses. To sum up, in fact, the resin lens is not bad. Although the resin lens can't be broken, you should take care of it when you use it. I'd like to share with you.

Which kind of glasses is good

First: I think resin lenses are cost-effective, relatively high lenses, so next, I will focus on resin lenses. I hope my common sense can help you choose a suitable lens. There is no best lens, only the most suitable one. Resin lenses are divided into ordinary, ultra-thin, ultra-thin, spherical, aspheric, color change and non color change.

Second: the thickness of the lens is divided into: ordinary, ultra-thin, ultra-thin; according to personal preferences, generally thin lens, the price will be relatively higher. You don't have to pay attention to this. Generally, if the lens is discolored, it can be inferred that the lens is radiation proof, and the non discolored lens is non radiation proof. It is recommended to choose the discolored lens.

Third: lenses can be divided into spherical and aspheric surfaces according to the appearance of objects. The aspheric surface can see the object more clearly without deformation, and can prevent further deepening. Spherical surface means that there is only one plane to look at the object. When you squint around, the scene you can see may be a little deformed, and there is no sense of three-dimensional.

matters needing attention

Resin lens is widely used because of its good quality and low price. But its disadvantage is easy to scratch, and there is no way to repair after scratch, so remember to put it into the glasses box when not in use, so as to increase its service life. Under normal circumstances, a resin lens can be used for 2 years. If it is well protected, it can be used for a longer time.