Two ways to identify when buying sunglasses
If it is a sunglasses with "impact-resistant" function, the label or instruction booklet should have "anti-impact performance", "passed the US FDA certification", "conforms to the highest standards in Europe and the United States" and so on. At the same time, these signs or instructions should be kept well, in case there is a problem with evidence.
Especially for myopic children to fit myopia sunglasses, it is recommended to fit myopic sunglasses with impact resistance to prevent children who are naturally active and active from having unnecessary accidents during exercise.
2. Observe the quality of the lens
When the sunglasses are placed in front of the eyes, observe the distance through the lens, move the glasses up and down, left and right, the target should not swing, and the color of the lens is stable. Looking out through the lens, the color of the surrounding things is not distorted, and it has the ability to identify signal lights of different colors.
The shade of sunglass color does not help much to resist ultraviolet rays. In addition to pursuing beauty and recognizing the logo, when choosing sunglasses, you should pay attention to the protective effect of sunglasses. Good sunglasses can effectively block ultraviolet rays and glare, and can reduce bright and harmful ultraviolet rays ( UV) light and glare damage to the eyes. Polarized lenses, anti-reflection coated lenses, etc. can make sunglasses better to reduce glare, prevent reflection, increase the contrast of objects in foggy and cloudy days, and make the field of vision clear.
