Your cornea will have to absorb most of the UV radiation when exposed to sunlight, causing cataracts or macular degeneration, keratitis, corneal keratocytes … many Eye diseases can arise with the negative impact of UV rays. Especially the days UV rays are as dangerous as they are now . Sunglasses are not merely a fashion accessory but also a protective item for the eyes. Therefore, choosing the right glasses is extremely important to keep your eyes safe. You need to pay special attention to this index on the glass to choose the most effective UV protection. Standard UV resistant sunglasses UV400 glass is recognized as having the highest UV protection standards. With the ability to block radiant light rays with a wavelength up to 400 nanometers. This standard is considered quite high and strict for maximum UV protection for your eyes when going in the sun. Wholesale Assorted Colors Metal UV400 Square Aviator Fashion Sunglasses Womens Bulk. From the ability to protect eyes from dust, smoke and solar radiation, when choosing UV400 glasses, you should pay attention to choosing glasses according to the following standards: * According to Australian standard AS 1067 . Sunglasses are divided into 5 categories, from UV filter category 0 to UV filter category 4, based on the amount of light the glasses absorb. UV filter category 0 has the least ability to block UV rays and sunlight. UV filter category 04 has the best level of protection. * The US standard is ANSI Z80.3-1972 . Under this type of standard, lenses should be able to keep UVB rays no more than 1% and UVA rays no more than 0.5 times that of visible light. * The European standard is EN 1836: 2005 . According to this type of standard, the UV filter category 0 is the glass that does not block UV at the necessary level, the UV filter category 1 is sufficient, the UV filter category 2 is the good compartment, and the UV filter category 3 is the complete compartment. The standard size for a UV-protective eyewear according to European standards is EN 1836: 2005. The material of the sunglasses resists UV rays In the old days, sunglasses were simply made of glass. But today, most of the better, more durable lenses are made of plastic because it filters ultraviolet rays. This special plastic, called polycarbonate, is capable of withstanding strong bumps. There is a special type of glass called high index (more clearly high index of refraction, meaning high index of refraction) that is resistant to large amounts of ultraviolet radiation and also thinner glass thickness. In addition, there are also reflective mirror lenses on the market. This type has good light blocking ability but is not effective against UV rays. Note – Choose sunglasses with large lenses that fit perfectly to your face, and wrap around your eyes to better block out the sun. – Never look directly at the sun, even when wearing sunglasses to avoid chronic eye diseases. – Some types of contact lenses are also UV resistant but do not cover the eyes. So, you should still use sunglasses for full protection.

Enough sun protection technology At the UV100 store (Nguyen Dinh Chieu, District 3, Ho Chi Minh City), a pair of gloves costs more than 500,000 VND, many times higher than a pair of normal gloves which only costs about 20,000-30,000 VND. According to the salesman’s recommendation, this glove is both 99% UV resistant and antibacterial; able to dissipate heat, cool quickly due to the breathable fabric … Other products with anti-UV effects also have a sky-high price. Coat over 1 million VND, UV400 glasses over 600,000 VND / piece, mask over 100,000 VND / item … These products are tested for quality and UV protection by an accrediting agency of … Australia. Sunscreen shirt priced at 140,000 VND is introduced by a shop with enough technology with 99% sun protection. At 365 wholesale garment factory Vo Thanh Trang (Tan Binh district, Ho Chi Minh City), we were introduced to many multi-purpose instant sunscreen models including hats, masks, shirts, skirts and the selling price of only 125,000 VND / product. Products. The seller said that the product is made from Japan’s UPF 40 UV Cut anti-UV technology, which protects the skin from 95% of UV rays without applying sunscreen. On the products of the shirt there is no information of the manufacturer other than the words “VNXK” – exported Vietnamese goods. Also at another website specializing in selling mother and baby, many sunscreen products are being sold and introduced themselves according to the latest Japanese AIRISM technology. The selling price is only 140,000 VND / product. Some Japanese fashion brands such as Uniqlo are famous for using UV-resistant fabrics for their sun protection jackets and their product prices in this fashion chain are not less than 1 million VND. However, these products are also being copied and sold at many points and individuals for only 200,000-300,000 VND / product. The common point of selling ambiguous quality is that often the reason fabrics with UV protection cannot distinguish the quality of fabrics with the naked eye. Accompanied by a series of … international certificates. Anti-UV, no need for specialized products According to Assoc.Prof. Dr. Nguyen Manh Tuan – Deputy Director of the Institute of Applied Materials Science, there are many forms of radiation around us, high-energy radiation is electromagnetic, low-energy radiation is infrared. UV rays are classified as high energy radiation, capable of penetrating deep through clothing and causing damage to the skin. There are three types of UV rays: UVC (short wave light), UVB (strong impact on the skin’s surface, causing redness, sunburn and skin cancer risk), UVA (with the longest wavelength, penetrating depth). under the skin, causing skin aging and wrinkling). UPF index is an index evaluating the level of protection of a fabric material from UVA, UVB rays. The higher the UPF index, the lower the amount of UV light penetrating the fabric. An effective sunscreen should be made from fabric with a UPF rating of 15 to 50+, which is about UPF for the best skin protection. Normally, synthetic fibers such as polyester or nylon will be more resistant to UV rays than cotton. Depending on the fabric material that can block UV rays, at different levels. If the fabric is resistant to UVA and UVB rays, the manufacturer must add anti-UV chemicals (this chemical is also known as UV). But whether the chemical is good or not, the ability to resist UV rays, the index of any number must be tested and certified by the Vietnam Textile Institute. “Cheap products on the street, because there are no measuring tools to check, so I do not know for sure what materials they use, whether they are dyed with anti-UV chemicals or not, how much UV protection is. If they use materials that are not good enough, do not dye UV chemicals but increase the product thickness, they can also block UV rays, just the level of resistance can not be maximized as advertised “, Assoc.Prof.Dr. Nguyen Manh Tuan said. Dr. Huynh Khanh Duy – Chemical Engineering Department, Ho Chi Minh City University of Technology said that no matter what material a product is made of, as long as UV rays cannot be penetrated, it is able to protect against the sun. Therefore, whether it is synthetic fiber fabric, cotton fabric, denim fabric, khaki … just thick enough is enough to effectively protect against the sun but the price is quite cheap. But in return, these products can not bring the desired coolness in the hot sun. “With products dyed with anti-UV chemicals, depending on the type of chemical used well or not, the dye will pass through the washing times. Many products on the market today do not announce how much UV protection, so UV resistance is also in the form of … bad luck. If you don’t have money to buy an expensive UV protection product, just take any shirt, put it in the sun, if the sunlight cannot penetrate the fabric hole, the product is highly UV resistant and vice versa. again “, Dr. Huynh Khanh Duy confirmed. According to MSc.Vu Thi Phuong Thao – Deputy Head of General Planning Department, Ho Chi Minh City Dermatology Hospital – some sunscreens can protect against UV rays but with a certain ability and still cannot replace cream Sunscreen. Although using coats, masks, gloves, glasses … consumers still have to coordinate with sunscreen to fully protect the skin when going out in the sun. The SPF number on a sunscreen product demonstrates the ability to protect the skin against UVB rays, the sunscreen used must be a broad spectrum, water-resistant and have an SPF of 30 or higher. If you must be active outdoors and sweat a lot, repeat the cream every 2 hours. (According to Women HCMC)