Sun glasses head halo

Sunglasses fashion, beautiful, radiation protection, these features let people like to wear sunglasses, but the experts pointed out that the choice of sunglasses to be careful, not onlyPlastic Sunglasses concerned with the design, but ignored the sunglasses itself quality problems. The four failed sunglasses do not wear:
1, anti-ultraviolet function unworthy of the name sunglasses. Good sunglasses lens, blocking more than 99% of ultraviolet rays, identification UV400 lenses are 100% (99.99%) for blocking ultraviolet rays. Wearing UV sunglasses, his eyes as if seen in the dark matter, the pupil will become large, but a large number of residual UV into the eyes, the eyes hurt. Best to go to the store to buy or purchase or flagship store to buy in a high-profile shop. Must not be enough to buy a small stall on those sunglasses to block ultraviolet rays, but the lenses work is not in place, that is substandard, do not because it was cheap to buy it, the eyes of the poor quality of the eyes will cause varying degrees of damage.
2, transmission than failed sunglasses. Wear sunglasses, will produce the traffic signal recognition obstacles, can easily result in a traffic accident. All sunglasses, including other than professional driving mirror, mirror movement, fishing mirror ...... myopia and reading glasses) simple method of identifying the sunglasses can be placed in front of a distant target viewed through the lens, such as window frames or door frames etc., and thenAviator sunglasses 2012 the glasses up and down to move back and forth, the target should not have swing and wavy deformation.
3, unlabeled category logo sunglasses. Sunglasses are generally divided into three categories, namely for the sun visor mirror, used for decorative light microscopy and special mirror used to prevent snow blindness or waterproofing plane radiation. If there is no identification of product categories, the consumer at the time of purchase can not correctly identify the purpose of the sunglasses, affect the results.
4, the fight against performance does not meet the requirements of sunglasses. Lens easily broken by external shocks, the eyes of the debris be formed fatal injuries. The frame material is also very important, the general sheet, aluminum-magnesium alloy, titanium. Different needs of the situation is not the same sun requirements, specially designed for sports polarized mirror movement, polarized driving lens, polarized fishing mirror, clear and sunglasses at the time of purchase, ask for professional use.
Experts advise consumers to buy sunglasses should go to regular storesMetal Sunglasses to buy well-known brands; purchase should first try them on and wear before and after wearing the color change, to wear sunglasses to see the color of the object is not distorted as should be.
To wear lens halo is why?
Sunglasses bring to the halo feel, mirror feet too tight, the nose pads discomfort arising feeling of pressure or the wrong lens the steradian, prism parameters caused. Multicolored phenomenon on the lens, in principle, has nothing to do with the dizziness, but may result in poor visual effects. Multicolored reason may be a problem, or the degree of the lens when emitted process liquid. The normal stresses of our glasses come from the Chinese high-end glasses professional manufacturers, and a long history of Taiwanese manufacturers. In this regard should control is good, but sometimes it may be unavoidable negative phenomena. After all, the handiwork. 8 bend more than the number of sunglasses is a degree, may also cause dizziness. Added: most of the angle of the nose pads adjustable, dizziness is also very likely sunglasses unqualified, Metal aviator sunglassesshould stop wearing.
Experts advise: children under 6 years old, it is inappropriate for a long time to wear sunglasses because their development of visual function does not reach adult levels, sunglasses for a long time might lead to amblyopia.