Don’t know how to choose lenses? Let’s start with these three points

Glasses are lenses embedded in a frame and worn in front of the eye for protection or decorative purposes. Glasses can also be used to correct a variety of vision problems, including nearsightedness, farsightedness, astigmatism, presbyopia or strabismus, amblyopia and so on.
So what do you know about lenses? How to choose the lens that suits oneself? Let's start with three things:

glass

Lens tips

Lens transmittance: The higher the transmittance, the better the clarity
Type of lens:
Change color lens: change color lens can adjust the transmittance through lens change color, make the human eye adapt to the change of environment, reduce visual fatigue, protect the eye.
High refractive index lens: The higher the refractive index, the thinner the lens.
Progressive lenses: Adapt to all scenarios and distances

index

The lens material

Glass lens:
It is more scratch-resistant than other lenses, but relatively heavy.

Polymer resin lens:
Lighter than glass lenses, impact resistance is not easy to break, but the hardness is low, easy to scratch.

The PC lenses:
PC chemical name is polycarbonate, with strong toughness, also known as "space piece", "universe piece", "safety lens", not easy to break. They weigh only half as much as traditional resin lenses, and are mostly used in short-sighted lenses for children or eye masks for athletes.

Lens technology

The blue light:
Studies have found that blue light can cause chronic damage to the retina, causing macular degeneration. Now blue light is abundant in artificial light sources. Anti blue light lens can protect eyes, reduce the damage caused by computer and LED light source.

Polarization:
The characteristics of polarized light are generally to eliminate reflected light and scattered light, block strong light, isolate harmful ultraviolet light, visual impact is clearer, impact resistance, scratch resistance.

Lens coating:
It can reduce the reflected light of the lens surface, make the object clear, reduce the reflected light of the mirror, increase the transmittance of light.

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Post time: May-29-2022