How to distinguish the quality of sunglasses lenses?

1. Lens material

Polymer resin lenses: The lenses are lighter than glass lenses, are impact-resistant and not easily broken,

but have lower hardness and are prone to fluffing and scratches.

Glass lenses: Wear-resistant, but relatively speaking, they are heavier than lenses made of other materials and are easily broken.

2. The refractive index of the lens

The higher the refractive index, the thinner the lens and the higher the price.

For example, the optical properties of the lenses: sunglasses are flat lenses and cannot have diopters.

At the same time, they should not have optical defects that affect vision.

A simple identification method is to place the sunglasses in front of your eyes, observe distant objects through the lenses,

such as window frames or door frames, and then move the glasses up and down and back and forth.

The objects should not have swings or wavy deformations.

3. Lens color

Sunglasses are available in dark and light colors and should not have color distortion.

The color depth of the lenses should be chosen based on the desired activity location.

Different colors should be chosen for different light sources and different usage occasions.

The color of the lens will affect the colorization effect. Dark sunglasses are needed to effectively block the glare of summer light,

but if you're wearing them while biking or driving, you shouldn't choose lenses that are too dark.

Additionally, when sunglasses are used for daily driving, they also need to be able to recognize different colored traffic lights.