Lens color shades to meet the intended use of lens color depth selection, should be considered depending on the required activities, places, and occasions for different light sources, will affect the color of the lens shading effect. For sunglasses can effectively block the summer strong light, the color of glasses should be sufficient depth, but ride or drive, do not choose too dark lenses. Consumers can use the following method to easily identify what the intrinsic quality of the lens; the lens should meet the degree requirements for plain lenses, and should not affect vision optical flaws. Simple identification method can be placed in front of sunglasses, observe distant targets through the lens, such as window frames or door frames, etc., and then move back and forth up and down glasses, the target should not wobble and wavy deformation. Can also be observed under fluorescent lamp sunglasses lens surface images, moving images appear sunglasses so that the lamp in different parts of the lens, the lamp does not distort the image as the best Cheap Oakleys polarized sunglasses on the market today, mostly using resin polarized lenses, because the lens is thin, in the assembly are prone to distortion, buy with caution. Color of the lens can not be partial, should make the color of the surrounding environment is not distorted. Did not wear sunglasses in front, the first observation of red, green, yellow and other colors of objects, and then put on sunglasses, observe the same object twice the observed color can not be cast; otherwise it will reduce the ability to identify the traffic lights. The lens is colored sunglasses should pay attention to this special identification. Susceptible to improper eye wear sunglasses, cloudy, and there is no need to wear sunglasses indoors. Some people regardless of settings, regardless of sunlight intensity, even in the twilight, in the evening as well as in movies, television, also wearing sunglasses, which will inevitably increase the burden on the eyes adjust, causing muscle tension and fatigue, vision loss, visual objects blurred, and in severe dizziness, can not be long as the other symptoms. For the visual system is not perfect babies, children should not wear sunglasses. In addition to glass sunglasses, others wear sunglasses lens material is not high, the user should always pay attention to the surface of sunglasses case, when the wear of clarity, it should be replaced. Prepare a summer sunglasses make love eyes from UV damage is necessary, but if you if you chose a poor, substandard sunglasses, not only can not resist ultraviolet rays, and make pupil dilation, resulting in uptake of the eye lens more UV, so sunglasses must take into account the health and decorative two functions. Strong summer sunlight can damage the eyes, the eyes can cause acute damage, such as snow blindness, because a large area of snow reflect sunlight, the outer layer of the eye caused by ultraviolet radiation burns, the typical symptoms of eye pain, dryness, tearing, foreign body sensation gravel, skin redness, conjunctiva hyperemia, edema. Sun is too strong can cause chronic eye diseases such as cataracts, macular degeneration, apterygial, chronic conjunctivitis and so on. A survey showed that the incidence of these types of diseases in areas at high altitudes lower altitudes significantly higher, that is, because of the high altitude and strong ultraviolet sake. Therefore, scientific wearing Tiffany and Co Outlet sunglasses, one can prevent eye is acute UV radiation burns on the other hand also can prevent chronic diseases of the eye. Relatively strong rays of the sun, or when ambient sunlight reflected relatively strong, it needs to wear sunglasses, or no wear. Whether wearing sunglasses, mainly in the strength of the sun's rays to be, not with the season to be, because of the different seasons, different regions of the strength of the sun's rays is a big difference, we can pay attention to weather forecasts which referred to the day of UV intensity, If the UV intensity of the larger case, please try to give love eyes wearing a Cheap North Face Jackets sunglasses, avoid UV damage; an anti- UV sunglasses have the function, we can not distinguish with the naked eye, the manufacturer of the product is a consumer choose the express commitment share with protection sunglasses only reference, see the label and glasses express positive identification. UV damage to the human eye is mainly determined by the wavelength of ultraviolet radiation time and radiation intensity and the human eye own defense mechanism strength, cornea, lens is the most common eye tissues from UV damage, solar dermatitis and corneal endothelial damage, Daylight cataract is associated most relevant eye disease.
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