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

pharnorcia - supplier of silicone hydrogel invisible materials that can be worn overnight

TIME:2022-10-17 14:39:26

Silicone hydrogel contact lenses have gradually become well known to everyone. Now young people all know that silicone hydrogel contact lenses are good, but what are the benefits of silicone hydrogel contact lenses? How is it different from traditional hydrogel contact lenses? We take the latest pharnorcia third-generation silicone hydrogel contact lens material as an example to analyze:


1. Pharnorcia silicone hydrogel contact lens material features - high oxygen permeability:

Contact lenses are a barrier for oxygen to transmit to the cornea. The oxygen permeability is an indicator to measure this barrier. The larger the value, the more oxygen permeable it is. It is the product of the diffusion coefficient and the solubility coefficient of oxygen through the contact lens, so the oxygen transmission rate is determined by the lens material and has nothing to do with the geometry or arc design of the lens.

The oxygen permeability of contact lenses of traditional materials (hydrogel, HEMA) is only about 10, while the Dk/t value of silicone hydrogel materials is generally above 100, and the oxygen permeability can be improved by 6-10 compared with hydrogel materials. times more. Hydrogel contact lenses transmit oxygen through water. The higher the water content, the higher the oxygen permeability. However, the increase of water content will affect the formability of the lens. In addition, the lens with too high water content will easily absorb water from the eyes. portion, so this has always limited the improvement of the oxygen permeability of contact lenses.

However, pharnorcia's third-generation silicone hydrogel material breaks this limitation. The special material structure in the silicone hydrogel forms a dual channel of oxygen and water, allowing oxygen to reach the cornea directly, truly allowing the eyes to breathe freely.

2. Pharnorcia Silicone Hydrogel Contact Lens Material Features - Appropriate Water Content

The moisture content of a contact lens refers to the percentage of moisture in the total weight after the material of the contact lens is saturated with water, but it does not mean that the higher the moisture content of the contact lens, the better. For traditional water-gel lenses, in order to ensure the oxygen permeability of the lens, it relies on water to transmit oxygen to the eyes. At first, it will be comfortable and moisturizing, but as the wearing time increases, the water will evaporate, and the lens will not have enough water to support it. Water is drawn from the tears to replenish, and the eyes will feel dry.

And pharnorcia's third-generation silicone hydrogel contact lenses also broke this situation. The excellent ratio of high oxygen permeability and appropriate water content keeps tears stable and oxygen circulates continuously, so as to achieve a comfortable feeling of hydration, even if worn overnight. , still long-lasting moisturizing, free breathing.

3. International supply of pharnorcia silicone hydrogel contact lens materials:

pharnorcia has product quality recognized by major international customers, and dozens of international companies have identified pharnorcia as their designated global supplier. Committed to the research and development of high-purity silicone hydrogel contact lens materials, with 17 years of experience in research, development, production and export of silicone hydrogel materials. It has established the world's leading and only domestic research and development, production and sales platform for silicone hydrogel contact lens products and their special materials. After dozens of evaluations and promotions by world-class enterprise experts, as well as multiple verifications and audits by international large companies, a scientific and complete quality control system has been formed, and international industry-standard product quality standards have been established. It is also the only domestic company that exports three types of medical device ophthalmic materials to developed countries in Europe and the United States.

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pharnorcia - supplier of silicone hydrogel invisible materials that can be worn overnight

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