Pinduoduo contact lenses can be used.
Decorative colored flat contact lenses, commonly known as “colored lenses,” are contact lenses used to decorate and change the color of the cornea. Contact lenses are colored to beautify and decorate the eyes. Purpose: Flat colored contact lenses are not cosmetic products, but a medical device that must be strictly monitored like artificial heart valves and artificial kidneys. Since contact lenses directly cover the surface of the cornea and are in close contact with the eye tissues, they are. directly related to the safety of human eyes and poses a higher risk, managed as a third-class medical device in China.
Ordinary contact lenses have a "sandwich" structure, that is, a layer of tinted lenses is takene sandwiched between two layers of transparent lenses. However, there are also lower quality "colored lenses" that are tinted directly on them. the surface of the lenses, so they are worn for a long time. May cause eye discoloration.
Purchase precautions
When purchasing colored contact lenses, you should purchase them from a medical device company that has the required business license qualifications and check whether the purchased lenses the product is Obtain the medical device registration certificate, carefully check the product packaging to see if there is a medical device registration certificate number , manufacturer's name, production date and other information, and properly retain the purchase receipt.
In addition, be sure to pay attention to the oxygen permeability of the lens. PThe higher the oxygen permeability value, the stronger the ability to transport oxygen to the eyes. When purchasing, you can refer to the International. Association of Contact Lens Educators. Recommendation: The oxygen permeability of daily disposable products should be greater than 24 (DK/t); the oxygen permeability of monthly or annual disposable products should be greater than 87 (DK/t).