如何选择太阳眼镜（How do I choose sunglasses）.docVIP

如何选择太阳眼镜（How do I choose sunglasses） By summer, a pair of sunglasses is necessary, but if you choose is a poor quality, substandard sunglasses, not only can not resist ultraviolet rays, and the pupil will expand, the uptake of more UV eye lens, so the ornaments and sunglasses is not not essential. So, what should we pay attention to choosing sunglasses? To this end, I visited the Armed Police General Hospital, Dr. Tao hai. It is best to wear sunglasses when you are exposed to snow, clouds or water T: what common eye diseases can scientific wear sunglasses prevent? Tao sea: human life cannot do without the sun, but the sun is too strong will damage the eyes, can cause acute damage to the eyes, such as project (also known as solar ophthalmia), is due to a large area of snow (or clouds, calm water) reflects the light of the sun, so that the outer eye by ultraviolet radiation burns due to its typical symptoms eye pain, dryness, tearing, foreign body sensation gravel, skin redness, conjunctival hyperemia and edema. Sunlight is too strong, can also cause chronic eye diseases, such as cataracts, macular degeneration, pterygium, chronic conjunctivitis, and so on. A survey shows that the incidence of these diseases in high altitude areas at lower altitudes is significantly higher, because of high altitude ultraviolet radiation reasons. Therefore, the scientific wearing sunglasses, on the one hand can prevent ultraviolet radiation from the eyes of acute burns, on the other hand, can also prevent the above-mentioned chronic diseases of the eyes. T: do you need sunglasses to go out and have the sun? Tao Hai: when the sun is relatively strong, or when the surrounding environment reflects the relatively strong sunlight (such as exposure to reflective large surface of water), you need to wear sunglasses, otherwise you do not need to wear. Whether to wear sunglasses, mainly in the light intensity of the sun to determine, do not depend on the season, because different seasons, diffe