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误区一:水晶眼镜一定能养目 水晶眼镜能养目的说法从古流传至今。在科学不 发达的古代,由于没能找到比水晶更适合的材料制作 眼镜,价格昂贵的水晶眼镜成为达官显贵的选择,并由 此而象征高贵。水晶质地坚硬耐磨,隔热性能好,戴上 有清凉感,并因此有“养目”之说。然而水晶石的组成主 要是二氧化硅,其含量达到99．99％,纯水晶无色,紫外 线和红外线透过率较高;茶色水晶带颜色,降低了可见 光的透过率,但不能吸收紫外线红外线。紫外线对人眼
Misunderstanding one: crystal glasses will be able to keep crystal glasses can keep the purpose of the saying spread from ancient times until now. In the ancient underdeveloped science, unable to find more suitable than crystal crystal material, expensive crystal glasses become dignitaries choice, and thus a symbol of noble. Crystal hard and wear-resistant, good insulation properties, wear a sense of cool, and therefore “raise their heads,” said. However, the composition of the crystal stone is mainly silica, the content of 99.99%, pure crystal colorless, high UV and infrared transmittance; brown crystal with a color, reducing the transmittance of visible light, but can not absorb ultraviolet infrared. UV on the human eye