Experts say, the glasses has become many people the indispensable part in life, at present the glasses market has a certain scale, but has not yet been fully standardized, available on the market, there are still many inferior glasses were sold to consumers.cheap ray bans "So consumers choose and buy must discreet glasses."

"In general, inferior glasses from underground without card factory production, poorly equipped, cost is very low, so the price special cheap." Experts point out that, in lens materials, inferior glasses resin matrix is pure, can cause inspect content deformation or dizziness. Dispersion effect big, easy cause visual fatigue. Internal have bad stress exists, impact resistant ability is poor, fragile. Transmission rate and low, the luminosity uneven distribution. The refractive index of the publicity can not reach the standard, and exaggerated the lens ultra-thin degree. In addition, can not only prevent ultraviolet prevention or a small amount of ultraviolet light.

At the same time, in the lens surface treatment, shoddy, surface treatment is not good, no hardened the flower function. Coating technology is poor, easy to take off the membrane. Membrane of the short of asks, minus reflection ability low, no waterproof,fake ray bans anti-fouling, prevent mist, and other special function.

In the frames materials, inferior glasses metal smelting process is poor, lower purity, more than with impurity, even to the head of the may contain harmful radioactive elements, greater proportion, the bridge of the nose oppression effect is strong, go against the development of youngsters' and children's bridge of the nose. Flexibility is poor, very brittle is easy to break. Surface gloss and colour and lustre is poor, poor corrosion resistance, easy to rust, easy to change color. There are also the incitement to skin, easy to cause allergic, soft and yi deformation, etc.

For frames processing technology, experts also pointed out, inferior glasses rough surface, color and gray. Electroplating technology not beautiful, easy decolour. Welding technology is poor, solder rickety, easy to take off the welding. Hinge and threaded easy attaint.

Experts say, inferior glasses in the assembly would never state quality standards.replica ray bans High one low light eyes lens heart, left or right, from the pupil is inaccurate, not exactly a scattered axis, all can result in improper prism effect, affect the normal visual function.