分类
Eyeglasses

How should hydrogel lens choose after all

First of all, how to define the low and high water content of the Black Glasses Women lens? The water content of contact lenses is divided into low water content (30% to 50%), medium water content (51% to 60%) and high water content (61% or more). To sum up, is high water content better or low water content better? High water content Black Metal Frame Glasses lenses, though, have better oxygen permeability. However, it will absorb more water from tears, causing corneal dryness, and it is also easy to adsorb precipitated substances. In addition, due to the limitations of the process, in order to maintain the formability of the Black Glasses With Gold Trim lens, it is generally relatively thick, which also limits oxygen permeability to a certain extent. And the low water content lens although the lens shape is better. But lens oxygen permeability is poor, not easy to corneal health. Lenses are usually made thinner to maintain oxygen permeability. But you can’t make it too thin. Therefore, for the selection of Black And Gold Eyeglasses lens water content, the most important thing is to balance the relationship between lens water content and center thickness, the most ideal choice is the medium water content lens, which not only ensures the oxygen permeability, but also ensures the comfort of the lens, and achieves the best balance in terms of lens oxygen permeability and comfort.

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