Ekomi
Raising and lowering of the pH of the tear film occurs due to the retention of carbon dioxide (hypercapnia), which is formed as a result of the application of contact lenses. This causes acidosis of the tear film, and subsequently – corneal acidosis. Today, most contact lenses (except PMMA pmma.html) have some degree of transmission, allowing the exchange of gases through the lens and prevent increasing acidification of the cornea.
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Jessica James
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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.