求翻译：第四要看镜片是否平整，透晰度要高，太阳镜片材质有玻璃和树脂两种，而最好的太阳镜片应该采用偏光镜片。它采用和隐形眼镜一样轻巧精密的合成树脂制成，由7层薄片合成，最外面两层是超硬的耐磨层；第2层、第6层是防碎强化层；第3层、第5层是紫外线过滤层，最中间一层是偏光过滤层。偏光镜片能有效滤除反射光和有害紫外线，并具有防碎、防磨等功能。是什么意思？

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It is necessary to look at the 4 lens formation, whether through loans to high degrees, and the sun lens material has a glass and resin both, and the best way to Sun lenses are optical lenses should be used. It is used as a handy and contact lenses, and precision of polyresin and can consist of 7 la

Fourth must look the lens are whether smooth, passes clear to have to be high, the solar lens material quality has the glass and the resin two kinds, but the best solar lens should use the polarized light lens.It uses with the contact lenses is equally dexterous the precise synthetic resin to make,

IV depends on whether the lens formation, higher degree, two Sun lens materials are glass and resin, and the best Sun lens splitter should be adopted. It uses Lightweight precision as with contact lenses made of synthetic resin, synthesis from 7-layer sheet, the outermost two is super hard wear-resi