Customs knowledge: The import and export of glasses

The import and export of glasses

 

 

 

 

1、 Frame myopia glasses

 

 

 

Myopia glasses are glasses designed to correct vision and allow people to see distant objects clearly, with the aim of maintaining a certain degree of adjustment ability of the ciliary muscles of the eye.

 

 

 

Since the invention of lenses by humans in the 13th century, crystal glass has been used to grind lenses. In addition to natural crystals, China also uses artificial crystals, and later uses glass lenses. In 1937, France invented a plastic eyeglass called acrylic, which was not easily broken but had poor clarity. In 1954, an engineer from the French company Essilot was inspired by the materials used to make aircraft cabins, resulting in the invention of resin lenses. Since then, this type of lens has become the king of the world's lens kingdom and has been used to this day.

 

 

 

Classification suggestion: Myopic glasses can be classified as 90049090 according to the 2022 edition of the Customs Import and Export Tariff of the People's Republic of China.

 

 

 

2、 Contact myopia glasses

 

 

 

Contact lenses, as the name suggests, are the essence of the word 'hidden'. Contact lenses are a type of glasses without frames, which not only have the function of correcting vision with regular glasses, but also relieve the inconvenience caused by frame glasses. Therefore, wearing contact lenses has become a fashion trend for teenagers today.

 

 

 

Classification suggestion: Contact lens lenses can be classified as 90013000 according to the 2022 edition of the Customs Import and Export Tariff of the People's Republic of China, excluding those with medical correction functions.

 

 

 

3、 OK Mirror

 

 

 

The "OK lens" commonly seen in the market is actually a corneal shaping lens. The corneal shaping lens is made of breathable hard corneal contact lens material, which is a special type of hard oxygen permeable contact lens. Ordinary contact lenses only have the function of correcting vision when worn, while plastic lenses improve vision by changing the morphology of the cornea.

 

 

 

The inner surface of ordinary contact lenses is parallel to the surface of the cornea and coincides with each other. The lens brightness is adjusted by changing the outer surface of the lens. On the contrary, shaping mirrors have a relatively simple outer surface and a relatively complex inner surface. The inner surface of the shaping mirror is no longer parallel or aligned with the cornea, but creates some gaps between the lenses and corneas, using the effect of tears to change the morphology of the cornea.

 

 

 

Classification suggestion: "OK Mirror" can be classified as 90185000 according to the 2022 edition of the Customs Import and Export Tariff of the People's Republic of China.

4、 Sunglasses

 

 

 

Sunglasses, also known as sun visors, are used for shading. People usually rely on adjusting the size of their pupils to adjust their luminous flux when exposed to sunlight. When the intensity of light exceeds the eye's ability to regulate, it can cause harm to the human eye. So in outdoor activities, especially in summer, it is necessary to use sunshades to block out sunlight, in order to reduce eye fatigue or damage caused by strong light stimulation.

 

 

 

Classification suggestion: Sunglasses can be classified as 90041000 according to the 2022 edition of the Customs Import and Export Tariff of the People's Republic of China.

 

 

 

5、 Color changing glasses

 

 

 

The lenses of color changing glasses can darken when sunlight shines. When the lighting weakens, it becomes bright again. The reason for this is because the crystalline form of silver halide is at work. Under normal circumstances, it can maintain perfect transparency of the lens. Under the irradiation of sunlight, the silver in the crystal separates, and the free silver forms small aggregates inside the lens. These small silver aggregates are irregular blocks with interlocking teeth, unable to transmit light but can only absorb it, resulting in the lens becoming darker. In the case of dim light, the crystal forms again, and the lens returns to a bright state.

 

 

 

Classification suggestion: Color changing glasses can be classified as 90049010 according to the 2022 edition of the Customs Import and Export Tariff of the People's Republic of China.

 

 

 

6、 Video glasses, VR glasses

 

 

 

Video glasses are a type of virtual display on the head, also known as eyeglass display or portable cinema. Because eyeglass displays resemble glasses in appearance and are designed to display video images of audio and video players on large screens, they are vividly referred to as video glasses.

 

 

 

VR glasses, also known as VR headsets, are virtual reality headworn display devices. VR head display is the use of headworn display devices to block people's visual and auditory perception of the outside world, guiding users to create a sense of being in a virtual environment. The display principle is that the left and right eye screens display images of the left and right eyes respectively, and the human eye obtains this information with differences, which creates a sense of stereoscopy in the mind.

 

 

 

Suggestion for classification: Video glasses and VR glasses should be classified under headings 84.71, 85.28, 85.43, 95.04, etc. based on their structure and function.