Choose glasses is mainly according to the environment in the use of their work and life needs and glasses, glasses should have the performance, in the opted for glasses of the corrected visual acuity, distance, and glasses, should also consider the performance characteristics of different optical lenses are not the same as what.

Optical lens color

Vision, color and distance of the visual requirements of high and stable work, such as students, car drivers, surgeons, art workers, etc. should be selected colorless and transparent optical lenses. If the driver of the car wearing a heavy color of the lens, not sensitive to changes in distance, the distance is not accurate, easy to cause trouble.

Transmittance of lenses

Optical lens with multilayer anti reflective film, colorless optical lens and non spherical optical lens light transmittance is better.

Thickness of lens

And diopter lens size, and lens refraction rate, and frame size and shape, and pupil size and shift photocentric amount about, and astigmatism axial, and the lens properties (Bump).

Weight of lens

Glass lens is more important than the resin lens, which is related to the lens material. The same lens material, than great Bibi heavy weight, large volume than the small size (with lenses and shape and size.

Lens hardness

Glass lens than the resin lens high hardness, wear resistant.

Strength of lens

The resin lens is higher than the glass lens, and the impact is not easy to be broken.

Special function of lens

Such as anti ultraviolet, anti electromagnetic radiation, anti infrared, high temperature, oil resistance, acid and alkali, anti dispersion, anti deformation (ultra thin non spherical lens), anti glare and other functions. Such as electricity, gas lenses, lenses with computer, underwater lens, lens for fishing is different.

Lens shape

Choose the frame after the optical lens shape.