Rigid Gas Permeable (RGP) contact lenses,also known as "OK lenses," are specially designed high-oxygen-permeable lenses.By wearing them for a period of time,the hydraulic pressure formed by the tears between the lens and the cornea can reshape the cornea and temporarily reduce myopia.

RGP lenses are mainly made of silicone acrylate materials,which allow oxygen to pass through the lens to the cornea.This design makes RGP lenses more comfortable than traditional hard plastic contact lenses and also provides a clearer visual effect.

However,since orthokeratology lenses directly cover the corneal surface and are in close contact with eye tissues,there are certain risks in use.Therefore,this product is classified as Class III,and there are strict requirements for its materials,production,and clinical applications.Before use,it needs to be evaluated for safety and effectiveness,and a medical device registration certificate must be obtained before production,sales,and use.

For Rigid Gas Permeable (RGP) contact lenses,the following are the applicable inspection standards,import document review requirements,and standardized declaration requirements:

I.Applicable Inspection Standards

RGP lenses shall comply with inspection standards such as GB 11417.2-2012 Ophthalmic Optics - Contact Lenses - Part 2: Rigid Contact Lenses and YY 0477-2016 Rigid Gas Permeable Contact Lenses for Orthokeratology.Main testing items include: optical performance,geometric dimension requirements,material properties,biocompatibility evaluation,and microbiological requirements.

II.Import Document Review Requirements

Orthokeratology lenses belong to Class III medical devices and should obtain the Medical Device Registration Certificate of the Peoples Republic of China or relevant supporting documents when imported.The customs will conduct consistency verification of the medical device registration certificate and review relevant supporting documents.

III.Standardized Declaration Requirements

When declaring orthokeratology lenses,refer to the commodity code: 90185000.The most - favored - nation import tariff rate is 0%,and the general tariff rate is 17%;The tax rate is 13%.Classification elements should include the product name,purpose,and principle.Price elements should include the brand (Chinese or foreign name),model,and medical device registration number (if any).