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Raw materials for Silicone Hydrogel Contact lenses and
Monomers for foldable intraocular lenses (IOL)

CAS#146632-07-7,CAS#102789-79-7,Pharnorcia, why does the new silicone hydrogel contact lens material breathe

TIME:2022-10-08 15:13:04

For many people who wear soft contact lenses or color contact lenses for the first time, they will feel uncomfortable. One of the possible reasons is that the cornea lacks oxygen. Under normal circumstances, our cornea needs to "breathe", the oxygen permeability of contact lenses is an important indicator to evaluate the quality of contact lens materials, so the high oxygen permeability of lens materials is a very important factor in the selection of lenses.


In order to achieve oxygen permeability, contact lenses must have channels. The channel of a conventional hydrogel is water. Therefore, the higher the water content, the higher the oxygen permeability coefficient. However, the oxygen permeability of water is very limited, and if the water content is too high, it will take away the water in tears, resulting in dry eyes.

Dk/t represents the oxygen permeability of the contact lens material. The larger the value, the stronger the oxygen permeability, and the stronger the "breathing capacity" of the contact lens. The oxygen permeability of contact lenses made of traditional materials (hydrogel, HEMA) is only about 10-20, while the oxygen permeability of silicone hydrogel materials can be improved by more than 6-10 times compared with hydrogel materials. A special mesh material structure in that silicon hydrogel form a double channel of oxygen and water, so that the oxygen directly reach the cornea, and the oxygen permeability of the lens is greatly improved.

It can be seen that silicone hydrogel contact lenses have achieved a breakthrough in oxygen permeability of contact lenses and are truly breathing contact lenses. Since 2006, the pharnorcia industry spire team has been committed to the research and development of the third generation of biocompatible optometric high-purity hydrophilic silicone hydrogel polymer composites, and has achieved the perfect coupling of special long-chain silicone materials and hydrophilic materials. This formulation technology has achieved the revolutionary function of the third generation of silicone hydrogel.

This technology forms a stable biocompatible natural material with surface wettability and excellent water content. Without the surface treatment technology of the first generation, the third generation material itself has a strong ability to resist dirt and protein precipitation; There is no need to add moisturizing factors to the material like the second generation, and the third generation silicone hydrogel contact lens material itself has excellent moisture retention.

The core formula and self-owned materials bring excellent performance and low cost; material innovation makes the latest silicone hydrogel contact lens products, benefiting the vast number of contact lens users.

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Pharnorcia, why does the new silicone hydrogel contact lens material breathe

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