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The Refractive Index Is Determined By The Eyeglasses Materials Used

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Resin lenses themselves can absorb ultraviolet rays and have a good protective effect against ultraviolet rays from the front of the lens. However, ultraviolet rays on the back surface of the lens can still be reflected and enter the eye, causing harm. So, the double-sided UV protective sunglass near me film layer can effectively solve the problem of UV reflection on the back surface, providing better protection for the eyes.

 

Most mirror facial masks cannot be dyed according to the incoming plate, and the background color is fixed. Only fixed standard colors can be selected. If there are no special requirements, single focus (non-spherical) transparent resin lenses (single lens).

 

As for eyeglass online lens matching, I think it is a cost-effective choice, but perhaps friends with some experience in lens matching or knowledge of optometry would consider this channel better.

 

If the refractive power is high and customized eyeglasses lenses are needed to meet the requirements, it is recommended to directly consider the fully customized series lenses instead of customizing them in the inventory series lenses, which often have similar prices. You already have this degree, please treat your eyes better.

 

The refractive index of a lens is determined by the material used. All other parameters being equal, the higher the refractive index of the lens, the thinner the edge thickness of the lens (not necessarily much lighter, as substrates with higher refractive index generally have higher density).

Due to the different labeling of lens brands, some of the refractive indices below are within the same range, and lenses of the same material will be labeled around this value for each brand.

 

The Abbe number, also known as the dispersion coefficient, theoretically means that the larger the Abbe number, the smaller the dispersion and the better the imaging clarity. Due to different labeling of lens brands, lenses of the same material will be labeled around this value for each brand.

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