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      The eyes are one of the most prone to aging human organs, and high-intensity ultraviolet rays are the worst enemy of the eyes. Experts remind us that it is best to wear sunglasses when going out in summer to avoid sun damage. But improper use of sunglasses not only can not protect the eyes but will hurt the eyes.

      In order to pursue fashion, some young people use sunglasses as an ornament and prefer dark sunglasses, regardless of the occasion, their eyes will not be separated from the mirror, which will lead to decreased vision and blurred vision over time. In severe cases, headache, dizziness, vertigo, and Symptoms cannot be seen for a long time. To prevent this "sunglass syndrome", the main thing is to choose the right sunglasses and use them reasonably.

      Lens color is not the darker the better. When choosing sunglasses, the principle should be that the color of the surrounding environment is not distorted, the edge of the object is clear, and the signal lights of different colors can be effectively identified. It is best to choose gray, brown, and green colors for lenses because they have better absorption of infrared and ultraviolet rays. Whether to prevent ultraviolet rays has nothing to do with the shade of the lens, but is determined by the UV (ultraviolet) standard of the lens. For example, UV400 lenses can prevent 100% of ultraviolet rays, and UV100 lenses can prevent 96% to 98% of ultraviolet rays.

      Some sunglasses are not actually UV-protected but are darker in color, which can block some of the light in the visible spectrum, but merchants also sell them as UV sunglasses, and consumers mistakenly believe that the darker the color, the better the UV protection. In fact, these sunglasses are more likely to hurt the eyes. Because darker shades of sunglasses make the eyes receive less light, this stimulates the pupils to dilate to receive more light, and if the sunglasses don't have UV protection, the eyes receive more UV rays. Even if sunglasses have UV protection, darker colors are not necessarily better. The reason is that the pupils are forced to dilate for a long time, which will cause problems such as fatigue and visual impairment, and the light is too weak to easily make people unresponsive. The lenses of the sunglasses should ensure that 30% of the light can pass through, and gray or green is the best.

      Don't be greedy for cheap and choose inferior sunglasses. If you wear low-quality sunglasses that don't block UV rays, more UV rays enter your eyes than when you don't wear sunglasses, which is more likely to cause eye damage. Therefore, to buy sunglasses in regular stores, choose sunglasses with UV protection signs, such as "100% UV protection", "UV400", "UV protection" and other signs on the lenses or packaging.

      If you feel uncomfortable wearing sunglasses, you should deal with it in time. Once the symptoms of "sunglass syndrome" appear, they should stop wearing them, and take vitamin B1, B6, AD pills, and local hot compresses, physical therapy, acupuncture, massage, massage, etc. Those with mild symptoms generally stop wearing glasses for 2 to 4 weeks, and then gradually disappear. Those with severe symptoms should go to the hospital for examination and treatment in time.

     Wearing sunglasses is contraindicated. Not everyone is suitable for wearing sunglasses, and the following groups are not suitable.
1. Glaucoma patients: People with glaucoma need strong light exposure to make the pupils narrow and reduce the pressure in the eye. After wearing sunglasses, the light is reduced, the pupils are dilated, the intraocular pressure is easy to rise, and the eye pain is unbearable.
2. Patients with optic retinitis: Wearing sunglasses leads to poor nerve conduction and aggravates inflammation.
3. Colorblind patients: It is more difficult to distinguish colors when wearing sunglasses.
4. Night blindness patients: Wearing sunglasses weakens the light filter, causing vision loss and even seeing.
5. Children: It is not suitable for children under 6 years old to wear sunglasses for a long time, because children's visual function development has not reached the level of adults, wearing sunglasses for a long time may cause amblyopia.
      However, for patients with cataract, keratitis, conjunctivitis, retinal detachment, etc., wearing sunglasses can promote the recovery of the disease as soon as possible.