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1, no UV protection sunglasses do not wear
Not all lenses are called colored sunglasses. Sunglasses should be anti-ultraviolet (UV) identity, anti-UV factor of 400 or more lens, it has a role in protecting the eyes. It is worth noting that the choice of the function does not block ultraviolet inferior sunglasses, sunglasses worse than not, more likely to cause damage to the eyes. Because this sunglasses can block some of the light, but fail to do so ultraviolet light. After the person wearing the pupil will expand, ultraviolet easier access to the eyes, eye injury.
2, glaucoma patients should not wear cheap sunglasses uk
Wearing sun glasses, into the visible eye reduction, the pupil will naturally turn. This change in the pupil of healthy people without problems, but for glaucoma patients, but it is a threat, are likely to cause acute glaucoma, there jealous, a sharp decline in eye pain, headaches, vision, nausea, vomiting and other symptoms. Therefore, patients with glaucoma or suspected glaucoma, should not wear sunglasses.
Children under the age of 3, 6, not long wear sunglasses
Children under 6 years of visual function and development has not yet reached normal levels. If prolonged sun glasses, light entering the eye reduction, macular area can not be effectively stimulate light will affect its visual development. Serious, but also may lead to amblyopia. Therefore, children under 6 years of age should not be prolonged sun glasses.
4, edge width, rack thick, heavy weight do not wear sunglasses
Wear long edge width, frame thickness, heavy weight sunglasses, easily lead to "sunglasses syndrome." The syndrome is more fashionable young people. Typically, patients in the continuous wear these sunglasses 1-2 weeks, there will be such as nasal discomfort (as suffering from a cold), feeling "facial insects crawling" gingival numbness, discomfort on the front teeth, eyes acid swelling and other symptoms. This is mainly due to the thick frame, broad-brimmed, heavy weight sunglasses facial trigeminal nerve compression due.
5, no need to wear when determined not to wear
Some people, regardless of time and place, whether outdoors or indoors, sunny or cloudy, even at dusk, watching TV, watching movies, also wearing sunglasses. In fact, this seems to be "cool" approach, would increase the burden on the eyes, easy to cause muscle tension, blurred vision, dizziness and other symptoms of fatigue. More About Sunglasses From http://www.edaltd.co.uk/