It has been 60 years since the birth of contact lenses in the world, but they have always been hydrogel contact lenses made of HEMA materials. Twenty years ago, ophthalmologists in the United States cried out: "Contact lenses need new materials with high oxygen permeability!"! Contact lens materials need to be innovated! The use of the old generation of HEMA material contact lenses is like wearing a layer of plastic film, which is impermeable to oxygen. Long-term wearing of impermeable contact lenses will cause irreversible damage to the cornea and eyes.

This limitation is broken by pharnorcia's latest silicon hydrogel material, which breaks the monopoly. The special mesh material structure in the silicon hydrogel material allows oxygen to reach the cornea directly, making the Dk/t value (oxygen permeability) of the lens greatly improved. In addition to the difference in oxygen permeability, silicone hydrogel and hydrogel also have significant differences in mechanical and surface characteristics (hardness, hydrophilicity, wettability, etc.) As well as the precipitation of substances in the tear film, which meet the needs of healthy and comfortable ultra-long wear and are the first choice for healthy contact lenses at present.

    Silicone hydrogel contact lenses with pharnorcia's own materials and technology benefit the people, making the eyes of 700 million myopic people in China healthier, and achieving healthier, safer and more comfortable user needs. Silicone hydrogel contact lens materials have long been monopolized by European and American giants, and domestic contact lens users call for new material source factories with independent intellectual property rights. Fully replacing imports and allowing domestic users to wear silicone hydrogel contact lenses with higher quality and cost performance will bring revolutionary contributions to 700 million myopic users in China.

Recommendation of relevant raw materials

PEA_CAS#:3530-36-7

PEMA_CAS#:3683-12-3