What material is good for glasses?

Glass includes resin, PC, AC, glass, nylon, crystal, etc. It is better to suit yourself.

Features of lens: Traditional spherical lenses have distorted vision of the objects around the lens, which limits the wearer's vision. In the era of continuous technological progress, the aspheric design, an optical miracle, has minimized the lens edge aberration and made its wide field of vision meet the needs of customers.

The base curve of aspheric lens is flatter, lighter and looks more natural and beautiful. In the case of higher diopter, the deformation of eyes can be reduced. For consumers with high eyesight, it may be more suitable to choose aspherical lenses.

Reading glasses look at grid lines:

It is not easy to distinguish the lens barrel image of aspheric reading glasses from that of spherical mirrors. We can distinguish between spherical and aspherical surfaces by looking at the grid lines. In general, if the reading glasses above +2.00D are spherical, and if the convex surface is placed downward at 10cm above the grid paper, it can be found that the grid lines have pillow-shaped deformation and the middle is concave, but the grid effect of the aspherical mirror is corrected to be straight. The greater the degree, the more obvious the difference.

This test method is also suitable for myopia lenses above -3.00D, but the difference is that the mesh effect of spherical myopia lenses is barrel-shaped deformation bulging in the middle, which is not obvious compared with reading glasses, so it can only be seen by carefully comparing aspheric surfaces with the same luminosity.

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