Check the product labels
Pay attention to whether the sunglasses are marked with anti-ultraviolet and impact-resistant functions. Not all sunglasses can block ultraviolet rays. If a pair of sunglasses has the “anti-ultraviolet” function, there should be labels such as “100% UV protection” or “UV400” on the product label or the front of the sunglasses.
For sunglasses with “impact-resistant” function, there should be descriptions like “with impact resistance”, “passed FDA certification”, “compliant with the highest European and American standards” on the label or instruction manual. Meanwhile, these labels or instruction manuals should be kept properly, so that there is evidence to rely on in case of problems.
In particular, when fitting myopic sunglasses for myopic children, it is recommended to choose myopic sunglass lenses with impact resistance to prevent unnecessary accidents for lively and active children during sports.
Observe the lens quality
When putting the sunglasses in front of your eyes, look at distant objects through the lenses. Move the glasses up, down, left and right, and the target should not swing, and the lens color should be stable. Looking through the lenses, the colors of surrounding things should not be distorted, and the ability to distinguish different color signal lights should be maintained.
The depth of the sunglasses lens color is not very helpful for resisting ultraviolet rays. When choosing sunglasses, in addition to pursuing beauty and recognizing the labels, more attention should be paid to their protective effect. Good sunglasses can effectively block ultraviolet rays and glare, and reduce the damage to eyes from bright light, harmful ultraviolet (UV) light and glare. Polarized lenses, anti-reflective coated lenses, etc., can help sunglasses better reduce glare, prevent reflection, increase the contrast of objects in foggy and cloudy days, and make the vision clear.
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