According to their preferences and different uses to select the Cheap Oakleys sunglasses, but the most fundamental thing is to protect the wearer from safety and vision are not subject to the basic principles of injury departure. Reducing light stimulation, visual clarity without distortion, anti- UV, no distortion of color recognition, accurate traffic signal recognition, should be the basic function of sunglasses. If there are defects in these functions, ranging from sunglasses would not achieve the role of weight will produce dizziness, eye soreness and other symptoms not meet, so when choosing sunglasses, you cannot just focus on style, while ignoring its intrinsic quality.
When consumers buy sunglasses sure to note the following:
1, define their purpose to buy sunglasses
Currently selling sunglasses in the market there are two main categories, one category is " sunshades ", people rely on regulation in the sun often pupil size to adjust the flux, when the light intensity of more than ability to regulate the human eye, it will cause harm to the human eye. Block the sun visor mirror can play a role, in order to reduce eye fatigue due to over- regulate or injury caused by the light stimulation caused; Another is " light-colored sunglasses," and also the more popular varieties in recent years, primarily as decorative role, when the sun is not strong, they also can be used. Light-colored sunglasses because of its colorful, rich, fashionable and diverse, loved by the young people. For this type of product, if there is no scientific understanding, will adversely affect users. For example, long-term wear certain colors of glasses can cause eye fatigue, if these glasses wearers also mistakenly used when sunshades, not only would not achieve shading effects, may also damage the human eye.
We want to buy sunglasses, we must first determine their purpose is to buy shade, or to get dressed, play a decorative role? In addition to the shade, if there UV functional requirements? On the safety performance of the lens any special requirements. Only clear these goals, combined with style and wear in my face the practical effect, can buy a pair of suitable Cheap Oakleys Frogskins Sunglasses Outlet sunglasses.
2, learn to understand the product identification
A sunglasses line with our current standards do not necessarily have the impact or other additional UV protective properties. Only when there are explicit performance products, will be the assessment of these indicators.
identifies a) the UV feature
Ultraviolet light with a wavelength in the 200nm ~ 380nm between the sun's rays, ultraviolet damage to the human eye depends mainly on the wavelength, the radiation time and the intensity of the eye’s own defense mechanism, and the strength of the ultraviolet light, the cornea, lens by ultraviolet is the most common damage to eye tissue, solar keratitis and corneal endothelial damage, cataracts are associated most sunlight -related eye diseases. In order to protect the health of the eye, you can choose sunglasses with UV function; try to eliminate UV 380nm or less. Special attention should be optional UV glass lens features from random statistical point of view; the glass is difficult to fully meet the requirements of UV.
b) the identification of safety performance
Sunglasses with safety performance, its lens using materials such as films such as the impact of the PC, and the instructions on the label often marked with a "There is shock resistance ", " by the U.S. FDA certification", " Europe meets the highest standards" and so, if the product can meet the requirements on the logo for motorcycle riders, drivers and other special requirements on the safety performance of the consumer is a good choice.
Consumers should buy the product to obtain a complete package and save well; these are the manufacturer’s commitment to product performance. Or allow businesses to these additional protection stated on the invoice, in case of disputes, it is not because of the lack of evidence and passive.
c) Lens color shades to meet the intended use
Lens color depth selection, the activities should be considered depending on the desired place, for different light sources and occasions, will affect the color of the lens shading effect. For Discount Oakleys Flak Jacket Sunglasses Cheap sunglasses can effectively block the summer strong light, the colors should have sufficient depth, but ride or drive, do not choose too dark lenses.