Do eyeglasses belong to the category of medical devices? Is there a three guarantees regulation? What is the specific content of the national unified not local regulations - thank you!

The State Food and Drug Administration "on the corneal contact lenses do not belong to the implantation of medical devices notice" clearly stipulates that contact lenses belong to the long-term contact with the cornea of Class III medical devices. Therefore, contact lenses are medical devices, while non-contact lenses are not medical devices. Whether contact or non-contact lenses have three packages, within 7 days from the date of sale, performance failure and other quality problems, customers can choose to return or exchange credit. I hope my answer can help you, look forward to your favorable opinion oh!