Types of optical lenses (I-I)
Optical lens -- Kesai lens: the lens is light pink, with strong aesthetic feeling and soft vision.
Optical lens -- color change lens: the color becomes darker under ultraviolet (outdoor) radiation. Generally, the color change includes tan, gray, and tea gray. After avoiding ultraviolet radiation, the color gradually recovers to the level before color change. For people who travel far to work or often work outdoors, it is ideal to wear a color change film.
Optical lens - ultra-thin lens: due to the improvement of the refractive index of the lens, the edge thickness of the lens is thinner than that of ordinary refractive index lenses for high myopia, which is more beautiful in appearance and expands the range of lens frames. Therefore, the effect of ultra-thin lenses for high myopia patients is better, while the advantage of low degree patients is unclear and obvious.
Optical lenses -- coated lenses: coated lenses are coated with multilayer films on the above-mentioned optical lenses, which are used to enhance the transparency, better prevent ultraviolet rays, and have clear and bright vision. At present, the coated lenses are still high grade lenses.
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