Pharnorcia provides high purity monomers for Silicone Hydrogel Contact lens.

Internationally, contact lenses have been born for 60 years, but they are always hydrogel contact lenses made of HEMA materials. The oxygen required by the eye is mainly transmitted through water. There are two sources of water, one is the moisture of the tear film, and the other is the moisture of the lens. Generally, the higher the moisture content of the lens, the higher the oxygen supply, but the increase of the moisture content will affect the lens performance. Formability. In addition, lenses with too high water content will suck eye moisture. Since HEMA material contact lenses are impermeable to oxygen, this has always limited the increase in oxygen permeability of HEMA material contact lenses.

Silicone hydrogel is a hydrophilic organic polymer material with a "honeycomb" structure. The special mesh material structure in the silicon hydrogel forms a dual channel of oxygen and water, allowing oxygen to reach the cornea directly. It has higher oxygen permeability. Because silicon is a material with good oxygen permeability, oxygen can reach the eyes through contact lenses through du Pharnorcia provides high purity monomers for Silicone Hydrogel Contact lens.

Internationally, contact lenses have been born for 60 years, but they are always hydrogel contact lenses made of HEMA materials. The oxygen required by the eye is mainly transmitted through water. There are two sources of water, one is the moisture of the tear film, and the other is the moisture of the lens.  al channels. In addition, the addition of organic silicon also plays a role in enhancing the mechanical properties of the material. Therefore, for those who wear contact lenses for a long time and those who are prone to dry eyes, in addition to the difference in oxygen permeability, silicone hydrogels and hydrogels have mechanical and surface properties (hardness, hydrophilicity, wetness, etc.) and tear film. There is also a significant difference in substance precipitation in the medium, which meets the needs of healthy, comfortable and long-wearing. Silicon hydrogel contact lenses have huge advantages and are currently the first choice for healthy contact lenses.