Sunglasses essential features are: reduction of glare stimulus, to see clearly without deformation, UV, Cheap Oakleys Sunglasses color recognition traffic signal distortion, accurate identification. Poor quality may occur if acid expansion, dizziness, eye color illusion, walking to see the symptoms of inequality. Shop for sunglasses, the most fundamental principle is to ensure that the wearer's vision health, followed by styles.
1, a clear buy objective:
Sunglasses sold on the market today there are two major categories: visor mirrors and tinted sunglasses. People usually want to control pupil size in the sunlight to regulate the luminous flux, when light intensity exceeds adjustment ability of the human eye will cause harm to the human eye. Visor mirrors can play the role of the Sun, to relieve eye fatigue caused by adjusting or harm caused by strong light stimulation. Light colored sunglasses are popular varieties in recent years, mainly for decorative effect. Due to its colorful, rich, fashionable and diverse, favoured by young people, fashion women's love, plus more. But if not used scientifically would bring adverse effects to the consumer. Such as long-term wear a certain color of glasses can result in eye fatigue; if glasses such as visor mirrors, visor has not only failed to effect and could also damage the eye.
2, read the product identification (with anti-UV features selected performance Cheap Oakleys Frogskins Sunglasses Outlet sunglasses, safety protection):
About the features of UV-ID: ultraviolet refers to wavelengths in the 200~380nm of the Sun's rays and consists of 3 types: UVA wavelength for wavelength for wavelength of 315~380nm,UVB 280~315nm,UVC 200~280nm. Of the solar light reaching the Earth's surface (290~2000nm), ultraviolet radiation accounts for about 13%, which 97% UVA, UVB, 3%, UVC is close to 0. UV damage to human eyes mainly on ultraviolet radiation and radiation wavelength, intensity and self-defense mechanism of the human eye, strong or weak, UV damage to the cornea, crystalline lens is most commonly the eye tissues, solar keratitis and corneal endothelial damage, eye diseases cataract is related to most the Sun. In order to protect eye health, you can choose sunglasses with UV capabilities, eliminate the below 380nm ultraviolet rays.
About security performance of identifies: has security protection performance of Sun mirror its lenses used such as PC tablets, anti-shock of material produced, in label and manual Shang often logo Shang "has anti-shock performance", and "through United States FDA certification", and "meet Europe Supreme standard" wait, if products can reached identifies Shang of requires, on motorcycle hand, and driver, on security can has special requires of consumers is a is good of select.
Shading to be consistent with the intended use of the lens: lens shading option may be required should be seen as a place of, and occasions for different light sources, color will affect the lighting effect of the lens. To make sunglasses can effectively block the summer glare, glasses of color should have enough depth, but a bike or motorists do not select Discount Oakleys Flak Jacket Sunglasses Cheap lens color is too dark.