1, silicon hydrogel has loose structure, small intermolecular force and large free space, and has been widely used as oxygen-enriched membrane polymer material with the highest oxygen permeability coefficient in medical devices.
2. The ability to decompose protein is much better, the most prominent ones are moisturizing and high softness, and the comfort is better.
3. The only FDA-certified silicone hydrogel material with a DK/L value as high as 160 can theoretically be worn continuously for seven days and six nights.
Extended data:
Silicon hydrogel is an organic polymer material, which is hydrophilic and has a biphasic material skeleton, that is, it has two channels: fluorosilicone and hydrogel. Often used to make high-grade contact lenses. Silicone hydrogel contact lens is an innovative patented lens introduced by vision company of Novartis Group.
Development history
Silicon hydrogel lenses have experienced the development of the first generation, the second generation and the third generation of raw materials, and each generation of raw materials does not replace or is based on the previous generation. On the contrary, the three generations of raw materials have their own advantages because of their different chemical polymers, processing technologies and material properties.
1, first generation
Vision companies: Lotrafilcon A, Lotrafilcon B, Kang Shu.
Bosch & Lomb Company: Pure View Moon Throwing (Balafilcon A)
2, the second generation
Johnson & Johnson Company: European comfort two-week throw (Senofilcon A), bright eye two-week throw (Galyfilcon A) and An Shu day throw (Narafilcon A, Narafilcon B).
3, the third generation
Cooper Company: Aviana Comfilcon A (foreign two-week throwing, domestic moon throwing, Enfilcon A).
Shafulong Company: Clarity Moon Throwing (Filcon Ⅱ 3) and Clarity1Solar Throwing (Filcon Ⅱ 3).
Haichang Company: Optimal Balance of O2++ Lunar Throwing (Filcon Ⅱ 3)
References:
Baidu encyclopedia-silicon hydrogel