So many fake products are out there. They are cheaper and may appear similar to real products, but they do not use the same technology. Therefore, you will not get the benefits that authentic products offer. That’s why you should make sure you have genuine lenses, which you will easily recognise with an engraving of the brand’s trademark Z on the lenses themselves.
All “Z” inscriptions are almost unnoticeable, so you can be sure that they do not cause any vision obstructions. It also helps to buy your lenses from reputable places, such as E Eye Place, to avoid counterfeits.