Jiayu Product Knowledge: Tips on using sunglasses

May 11, 2021

1) Under normal circumstances, 8-40% of light can penetrate sunglasses. Most people choose 15-25% sunglasses. Outdoors, most color-changing glasses are in this range, but the light transmittance of glasses from different manufacturers is different. Darker color changing glasses can penetrate 12% (outdoor) to 75% (indoor) light. Brands with lighter colors can penetrate 35% (outdoor) to 85% (indoor) light.
2) Although the color-changing glasses are suitable for daily use, they are not suitable for sports activities in glare environments, such as boating or skiing. The shading degree and color depth of sunglasses cannot be used as a measure of UV protection. Glass, plastic or polycarbonate lenses have added chemicals that absorb ultraviolet light. They are usually colorless, and even the transparent lens can block ultraviolet light after treatment.
3) The chromaticity and shading of the lenses are different. Sunglasses with light to moderate shading are suitable for daily wear. In bright light conditions or outdoor sports, it is advisable to choose sunglasses with strong shading.

4) The shading degree of the gradient dichroic lens decreases sequentially from top to bottom or from top to middle. It can protect the eyes from glare when people look at the sky, and at the same time clearly see the scenery below. The top and bottom of the double gradient lens are darker, and the middle is lighter. They can effectively reflect glare from water or snow. We recommend not to use such sunglasses while driving because they will blur the dashboard.
5) Prescription sunglasses can be customized according to your needs. In addition to adding chemicals that absorb ultraviolet rays, dyeing materials can also be added during the production process of sunglasses lenses. In addition to dyeing materials, some have also developed chemical substances that filter light, which can absorb specific parts of the spectrum. Combining dyeing and filtering substances to develop sunglasses dyes for specific sports, such as golf.
6) Dyed lenses have different light filtering functions. Most tinted lenses can block 70-90% of the light. Some dyed lenses can only filter visible light of specific wavelengths, but cannot filter light of other wavelengths. Therefore, different dyeing may deepen the color or change the color, affecting the contrast ratio. Some colors, such as pink, blue, or purple, are purely decorative, and the effect of filtering light is extremely poor. The best way to choose tinted lenses is to hold the sunglasses with your arms straight and judge the color against a white background.

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Xiamen Jiayu Optical Co., Ltd.

https://www.jiayusunglasses.com
Address: 厦门
Phone: 86-592-5203016
Business Type: Industry & Trading,

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