Can sunglasses clips be used at will?

In order to avoid carrying too many glasses, myopia patients usually choose convenient and quick color-changing lenses or external sunglasses clips, which can not only reduce the burden of going out, but also protect their eyes and prevent ultraviolet rays. However, the quality of external sunglasses clips on the market is uneven. Improper selection will not only affect our vision, but also damage the lenses of the eyes.

When we buy clips for external sunglasses, we must first confirm whether the products we buy have anti-ultraviolet function. If there is no anti-ultraviolet function, only the filtering function, we can't stop the damage of ultraviolet rays to the eyes. Before buying, the general merchants will have money detectors or professional instruments to detect whether they are UV-proof. Testing with this instrument is simple and quick. Using the money detector to identify, you can put 100 yuan notes into the money detector, and then use the lens to block ultraviolet rays to see if there is an anti-counterfeiting mark. Those with anti-counterfeiting marks are not anti-ultraviolet products, and those without anti-counterfeiting marks are anti-ultraviolet products.

Polarization effect helps us to better distinguish objects under strong light and reflected light. Whether driving, skiing or fishing, it can improve our visual effect. Generally, external sunglasses clips will have this function, but in order to buy products with confidence, we can use the polarized test card of the merchant to test, which is usually a pattern of water and fish. Wearing glasses can treat a fish as a lens with polarization effect. If there is no polarization test card, two polarized lenses can also be overlapped, and the objects outside the lenses can't be seen as polarizers at all, and the objects can't be seen as unpolarized products.

The fastening devices on many polarizing clips are iron, which is easy to scratch the lens. When choosing products, we should pay attention to the smoothness of product details to avoid scratching our glasses. The stress point in contact with the lens needs special attention. Pay attention to whether the contact point between the product and the lens fits well and is separated by rubber/silica gel. Don't choose the outer clip of metal products, which is easy to scratch the lens and affect your vision.