What should I pay attention to when buying sunglasses?
Lens: I believe everyone has seen the "sunglasses" sold by the Tianqiao stall. Those glasses not only fail to protect the eyes, but do more harm to them. This is because people's pupils contract and enlarge according to the intensity of light, and automatically shrink under strong light, thus reducing the receiving surface of ultraviolet rays. The lenses of inferior sunglasses are usually ordinary colored lenses, which not only do not have the function of preventing ultraviolet rays, but also provide a dark environment for the pupils to have no. Therefore, first of all, we should choose lenses with anti-ultraviolet function. As for the color of the lens, it needs to be selected according to the intensity of light. In addition, many sunglasses also have polarizing function, and polarizers are also necessary items for driving, fishing and other activities.
Frame: The frame of inferior sunglasses is generally made of cheap plastic or ordinary metal. These frames are generally hard, and their toughness and thermal stability are far less than TR90, Ni-Al alloy and Ni-Ag alloy used in high-quality sunglasses.
Nose pads and temples: High-quality sunglasses are often designed with different nose pads and temples according to different styles and needs of different wearers. Anti-slip soft rubber is added to the nose pad and temples of sports glasses, and the adjustable nose pad is designed to adapt to different noses, while inferior sunglasses often do not have these humanized designs.
Details: I don't know if you have carefully compared the differences in details between two pairs of sunglasses with large price differences. For me, these details are the focus of investigation besides the basic materials of glasses. The polishing process of the lens edge, the connection between the lens and the frame, the gloss of the painting, and even the integrity of the painting at the hinge are the key points to determine whether a pair of sunglasses is of high quality.
Generally speaking, a pair of good sunglasses must meet the following basic conditions: the lens adopts PC lens, which is anti-ultraviolet and impact-resistant, and the lens curvature is uniform; The frame is made of high quality materials (TR90, etc.). ); The design is comfortable, the workmanship is fine and the details can be handled well. On this basis, you can choose the right sunglasses according to your own needs.
Compared with expensive watches, gorgeous clothes and fashionable mobile phones, a pair of good sunglasses can be regarded as a cheap product, which can not only protect the eyes, but also add a lot of fashionable and personalized elements to themselves, which is both beautiful and practical. Besides the polarizer, I also have a pair of sunglasses whose lenses can be changed by myself. The brand is opticnerve, which was bought in America. A pair of glasses always has four sets of lenses. I can choose the right lens according to the light intensity of the day, which is very convenient. People only have a pair of eyes, so it is necessary to make a little "investment" on this window of the soul. Protect yourself, starting with your eyes! ……………………