A suitable color-changing glasses can not only help you resist the fierce sunlight and protect your eyes from ultraviolet rays (reducing the occurrence of cataracts), but also easy to use, especially suitable for myopic friends.
Photochromic lenses, also known as "photosensitive lenses". Because the chemical substance of silver halide is added to the lens, the original transparent and colorless lens will become a colored lens when exposed to strong light for protection, so it is suitable for indoor and outdoor use.
The color-changing lens is made of optical glass containing silver halide microcrystals. According to the principle of reversible light-color interconversion reaction, it can quickly darken under sunlight and ultraviolet light, completely absorb ultraviolet light, and absorb visible light neutrally; back to the dark, Can quickly restore colorless and transparent.
Color-changing lenses are mainly used in outdoor, snow, and indoor workplaces with strong light sources to prevent damage to the eyes from sunlight, ultraviolet light and glare.
In easy-to-understand terms, under strong light, the silver halide inside turns into black silver particles when illuminated by light.
1. Gray lens: can absorb infrared rays and 98% of ultraviolet rays. The biggest advantage of the gray lens is that the original color of the scene will not be changed by the lens, and the most satisfying thing is that it can reduce the light intensity very effectively. The gray lens can evenly absorb any color spectrum, so the viewing scene will only darken, but there will be no obvious chromatic aberration, showing a true natural feeling. It is a neutral color, suitable for all people.
2. Pink lenses: This is a very common color. It absorbs 95% of UV rays. If it is used as glasses for vision correction, women who must wear them often should choose light red lenses, because the light red lenses have better absorption of ultraviolet rays and can reduce the overall light intensity, so the wearer will feel more comfortable. .
3. Light purple lenses: Like pink lenses, they are more popular with mature women because of their relatively darker color.
4. Brown lenses: can absorb 100% of ultraviolet rays, and the brown lenses can filter out a lot of blue light, which can improve visual perception. Contrast and clarity, so it is very popular with wearers. Especially in the case of serious air pollution or fog, the wearing effect is better. Generally, it can block the reflected light of the smooth and bright surface, and the wearer can still see the fine part, which is the ideal choice for the driver. For middle-aged and elderly patients with high vision above 600 degrees, priority can be given.
5. Light blue lenses: Sun blue lenses can be worn when playing on the beach. The blue can effectively filter out the light blue reflected by the sea and the sky. Blue lenses should be avoided when driving because it can make it difficult for us to distinguish the color of traffic signals.
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