The heat of summer approaching, cheap oakleys sunglasses become the outdoor work and plays one of the menu items. But you know what? If the sunglasses choose properly, not only will not play the role of ultraviolet radiation shielding, may also cause a variety of diseases of the eye.
If you choose bad recessive eye, one can increase the incidence of cataracts. Because after wearing sunglasses, lens transparency decrease and eyes as if I don't see it in the darkroom, the pupil will get larger, residual ultraviolet significantly into the eye, when it was absorbed by corneal tissue of the eye surface, early will incur higher lens density, later will cause lens opacity and cataract.
Second is induced by acute glaucoma attack. Because after wearing sunglasses, into reduction of visible light in the eye, the pupil will naturally turn up, resulting in anterior chamber angle narrow, resulting in poor drainage of aqueous humor, a long, easy to induce acute episode of angle-closure glaucoma.
Third, it can lead to amblyopia. Visual function of children under 6 years old is not mature, long wearing ray ban outlet sun glasses, eyes cannot be effectively stimulated the macular area, will affect the further development of Visual, even visually.
Four is can cause eye strain. Some people regardless of time and place, whether outdoor or indoor, regardless of the intensity of sunlight, even in the twilight, evening, as well as in the movies, television, also wore sunglasses. Doing so would add to the burden of eye, caused by eye muscle tension, blurring of vision, severe dizziness occurs when, not long vision and other symptoms.
Five is the syndrome can cause your Sun glasses. Sunglasses syndrome is more common among fashionable young people, they prefer big glasses, a thick, heavy component of large frame sunglasses. 1-2 after weeks of continuous wear such glasses, mirrors can be orbital or parts between the two cheeks appear slow to symptoms such as numbness, perception, respiratory nasal discomfort feeling, just like caught a bad cold. Also it was felt like having small insects crawl on your face, maxillary gingival numb-site you feel unwell, acid eye swelling.
At the time of purchase of sunglasses, go to the regular shop and purchase qualified sunglasses brand shop. In addition, the note also colored the eyes does not necessarily block UV light, only when UV-protective film on the lenses, can be used as sunglasses.
How to identify pros and cons sunglasses
judging the merits of ray ban wayfarer sunglasses are available from both quality and aesthetic look. Aesthetic with a personal factor is a certain standard of quality. Quality mainly refers to the quality of the lenses of the sunglasses. The world's common set of standards for the United States food and medicine and health inspection service standards.
Under f • D• A standard, lenses in the guaranteed transmission rate at the same time, to filter out the Sun over 90% in ultraviolet light, lenses should bear a «UV-100PROTCT10N» tag, when you 100% filter out UV, should bear a «UV-400PROTCT10N» tag, therefore UV label on the viewing lens is very important. In addition, Sun lenses do not have optical lenses are «degrees» and must have high strength and impact resistance test.
A pair of high quality sunglasses should be able to 99% to 100%A-type and b-type filter ultraviolet rays. Sunglasses color should be uniform; image is not deformed or has other defects.
How to detect that your sunglasses are standards-compliant: it raises, some rectangular pattern-oriented, such as flooring, with a pair of eyes look. About lens slowly moved up and down, if the rectangular lines remain straight, sunglasses on your behalf in accordance with standards. Studies have shown that, at the time of snow skiing or water skiing at sea to wear sunglasses for cheap and poor quality compared to people without wearing cheap oakley sunglasses, eyes receiving UV dose is three times of the latter to the former times!
Комментарии