More and more people are aware of the need to wear sunglasses near me now in the summer, not only to protect the eyes and the young skin around the eyes, but also to prevent tanning. But how to choose a pair of qualified sunglasses is troubling many people, a look at the professional advice of the eye doctor ~
With the arrival of summer, the sun above the head is becoming more and more intense, and the ultraviolet rays are becoming stronger and stronger, it is necessary to prepare a suitable pair of sunglasses for yourself. Shanghai Eye Disease Prevention and Control Center science experts pointed out that wearing sunglasses, on the one hand, is to filter ultraviolet light, reduce ultraviolet light on the eye cornea, conjunctiva, lens and retina damage; On the other hand, it does not need to accept strong light and various glare irradiation, so that the eyes have a mild visual field environment. However, the wrong choice of sunglasses or the wrong use of sunglasses, can cause damage to the eyes. So how to choose the right sunglasses? Doctors suggest that when choosing sunglasses, we can not only pay attention to the style, but also look at the following aspects
Ultraviolet (uv) protection mark
For sunglasses, the uv index is the effect of filtering ultraviolet light, which should eliminate 280-400nm light. At present, the uv index of most sunglasses is between 96% and 98%. When buying sunglasses, check whether the lenses or packaging have labels such as "100% UV protection", "uv400" and "UV protection".
Choose grey, tan and green lenses
The choice of lens color should be based on the principle that the edge of the object being viewed is clear and can effectively identify different color signal lights. Gray, brown, green lenses have better absorption of infrared and ultraviolet rays.
Medium color depth lenses
The anti-ultraviolet function of sunglasses is related to factors such as the material and process of the lens, and the lens is generally good for medium color depth. Of course, if the shading effect is required to be strong, you should choose a darker lens.
The surface of the lens should be smooth, no scratches, no bubbles
The sunglasses can be 50cm away from the eyes, through the lens to observe the surrounding vertical and horizontal lines, such as window frames or door frames, and then move the glasses up and down and back, if the straight line is found to be distorted or swinging phenomenon, indicating that the lens is deformed and should not be worn. If the lens is uneven, there are scratches and bubbles, it will cause dizziness and other discomfort after wearing, and it is not suitable to buy.
Eye sun protection is important, but also combined with the actual situation, not everyone is suitable for wearing sunglasses oh! For example, glaucoma patients or people suspected of having glaucoma should not wear sunglasses. People with such eye diseases wear sunglasses, the visible light into the eye is reduced, the pupil will naturally open, a long time is easy to induce acute attacks of angle-closure glaucoma, red eyes, eye pain, rapid decline in vision and other symptoms.
In addition, ophthalmologists do not recommend that young children wear sunglasses for a long time or often, because normal light is more conducive to their visual development. In order to avoid UV damage to children's eyes, you can usually go out for "physical sunscreen", such as wearing a wide-brimmed hat or using a sunshade. Try not to take children outside when UV rays are strong or exposed to the sun. If it is impossible to avoid exposure to the sun outdoors, the child should not wear sunglasses for more than 2 hours.
