Basic knowledge of sunglasses

u003cbru003eFor spring and summer, sunglasses can be said to be an indispensable object, because in these two seasons, the sun’s ultraviolet radiation can be said to be very strong, and a pair of sunglasses can be very good To help you maintain your glasses, in addition, a fashionable sunglasses can also modify your face well and make you more stylish. Therefore, a fashionable sunglasses can resist ultraviolet rays and dress up. Necessities, so how can you miss as a fashionista! YC9707 Women's Sunglasses C8 Tortoiseshell/Colorful Yellow But the editor reminds everyone that when buying sunglasses, you have a lot of knowledge, so you may not be familiar with it. With more safe and healthy glasses, let's learn the basics of sunglasses together. The lens materials of sunglasses mainly include glass materials and resin materials. The glass material is hard, not simply scratched, has poor impact resistance, and simply shatters after being impacted, and the weight is relatively heavy. The resin lens is light in weight and suitable for casual wear. It has strong impact resistance and is not easily damaged. It has become the best choice for mainstream materials and the market! 1. The function of sunglasses According to experimental evaluations, a pair of human eyes consumes the human body every day 1/4 of their energy, together with various unnecessary light disturbances and the intrusion of ultraviolet rays from the sun, often damage the optic nerve and retina, causing visual fatigue and vision loss. Based on this important reason, sunglasses are more than just a This kind of decoration is also a requirement for eye protection. Sunglasses mainly have the following functions: (1) Optical aspect: Sunglasses are mainly flat light. For contact lens wearers, wearing sunglasses can avoid or Reduce the evaporation of contact lens moisture, and then maintain the optical performance of the lens. (2) Eye protection: It is mainly to avoid being burned by intense sunlight, and to block ultraviolet rays together, and to protect the glasses from damage, provided that the lenses must have the function of blocking ultraviolet rays. (3) Decoration: Many people choose sunglasses from the aspects of style and color. This is because sunglasses have become a must-have decoration for many people in summer, and they wear sunglasses even when the sun is not very intense or indoors. Some people also wear sunglasses on their heads for decoration. YC9709 Women's Sunglasses C4 Tortoiseshell/Lens Gray 2. The general types and characteristics of sunglasses lenses (1) Resin lens: light, half the weight of glass, not fragile, rich in color, and UV protection is better than glass. (2) Glass lens: including ordinary glass lens, optical glass lens, tempered glass lens, hard and wear-resistant. (3) Polarizer: The polarized lens is made of the same lightweight and fine synthetic resin as the contact lens. After it is made, it can filter out the reflection of the road due to wet water or sunlight. Main advantages: light, can filter out 99% of dazzling reflections and chaotic light, 96% (4) color-changing lens: the advantage of color-changing lens is that it can deal with the problem of frequency conversion correcting glasses and sunglasses. Wearing color-changing glasses can be said to be a way to correct the compromise between glasses and sunglasses. 3: The chromaticity and shading degree of the lens are different. When you wear it daily, you can choose a lower refractive index, such as: light to moderate shading sunglasses. For bright light conditions or outdoor sports, it is recommended that you choose sunglasses with strong shading. Related Reading: Sunglasses and Sunglasses
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