Zeiss lenses sold in optical stores, including online Taobao, can be verified for authenticity as long as they are shipped with a QR code on the package. There is also the Zeiss lens anti-counterfeiting mark

First, the anti-counterfeiting of Zeiss lenses is not displayed without fog, but can be seen directly, close to the edge of the lens. If you buy rough lenses, you can keep them for 100 yuan. Single vision lenses can be kept after assembly. After assembly, the anti-counterfeiting marks of astigmatism lenses may be worn away. The anti-counterfeiting mark of the lens can be seen through the reflection of the lens.

The second point is that all Carl Zeiss lenses will have laser anti-counterfeiting marks, which are shaped like two small flags put together. Laser anti-counterfeiting marks are difficult to imitate, and each lens has its original Factory warranty card.

The third point is to identify it through the warranty card. If the mark is worn off, you can identify it through the warranty card. Each pair of lenses corresponds to a card number. You can call to check the authenticity.

The fourth point is price. As a brand lens, Zeiss lenses are top-notch in terms of technology and quality, and they are not very cheap.