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Ekomi 4.8/5.0

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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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According to the law on sales registration, the seller is obliged to issue and provide receipts for all clients. It is also obligatory for the seller to register the sale with the tax administrator with no delay, within 48 hours in case of technical failure.