To judge the merits and demerits sunglasses can examine from the quality and aesthetic two aspects. Aesthetic with personal factors, quality, there is a certain standard. Sunglasses quality refers to the quality of lens. The universal standard for the United States Food and medicine and Health Inspection Bureau (F D A) standard.
One, according to the F D A standard, the lenses in the security and transparency, to more than 90% of the ultraviolet ray filter out the sun, the lens should be labeled “UV-100PROTCT10N” label, when the 100% filter ultraviolet, should be labeled “UV-400PROTCT10N” label, it is important to check the lens on the UV label.
Two, the lens can not only “degree of optical lens”. If the general diopter of more than 15%, when the wearer will be dizzy feeling.
Three, the lens must have higher strength and impact resistance test. In general, the plastic film (or cellulose acetate propionate), resin, glass strength from small to large.
In the face of dozens of brands, thousands of styles of sunglasses, how to choose a suitable for their own sunglasses? Often ride had better wear sunglasses worn resin sheet; motion frame radian larger sports sunglasses or a belt, chain; myopia or hyperopia people wear sunglasses, optical glasses can be clamped or wear special. Spring and autumn, the lens is shallow, frame color and sunglasses; frames to gorgeous color selection in winter, snow sports sunglasses to wear color film, winter use frame slightly larger sunglasses to wind.
A pair of sunglasses may because the brand, packaging, materials, styles, colors and publicity of the difference and make the price is far away, the consumer should give full consideration to the cost of manufacture, sales and service. Twenty or thirty yuan sunglasses, its quality is often not guaranteed. Larger glasses shops or large shopping malls counters to buy glasses, can generally get better assurance in the quality inspection, quarantine and other products.
At present, the domestic production of sunglasses is mainly Taiwan, Hongkong owned enterprises or joint ventures, and more concentrated in Guangdong, Fujian and other places, the quality of the products are generally in line with international standards. Products covered by the domestic market, but also exported to foreign countries. Several well-known brands include PARIM (PARIM), the blue boiling point (BLUEPOINT), Prosun (PROSUN) etc..
In the price of the sun mirror, share in the market first is PARIM (PARIM) sunglasses, the annual exports of more than $30000000. The product features: the outer packing glasses bag printed with “PARIM PARIM”; the lens with a “UV-400″ label or laser tag; special anti-counterfeiting label barcode printed clearly, “with the United States F • D • A standard” words; origin, telephone, address clearly.