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Ekomi 4.6/5.0

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Water content in contact lenses

Water content of a lens is expressed by percentage of water volume in a particular material. The optimal amount is about 60%. For hydrogel soft lenses transparency of media is dependent on the water content. Material aging decreases the water content and affects contact lens permeability for light (such a lens has a yellow or gray tint). Such a lens is already unusable. If a soft contact lens dries out, it is damaged and needs to be replaced.

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