When buying contact lenses these days, many people prefer the silicone hydrogel material, but if you don't know the material, you'll be confused about the choice. Now let's talk about silicon hydrogel contact lenses.
Currently, there are two types of soft contact lenses: hydrogels and silicon hydrogels. Hydrogels have long dominated contact lens materials due to their early development. Hydrogel contact lenses are hydrophilic and comfortable to wear, but the problem of water content and oxygen permeability cannot be solved.
Silicon hydrogels are developed on the basis of hydrogels. It inherits the hydrogel's watery and soft properties, with the addition of silicon. Silicon is a strong oxyphilic element, and when combined with oxygen, the structure is stable enough to allow oxygen to pass through, increasing the oxygen permeability of a lens to more than five times that of a regular lens.
It is because of the strong oxygen permeability, but also to a certain extent to reduce the protein precipitation. Cornea can breathe freely, normal metabolism, fundamentally avoid corneal swelling, inflammation and other symptoms. Even if long-term use, also can keep lens clean and comfortable, not easy to feel dry eyes.
Silicon hydrogel contact lenses aren't perfect, though, and they have their drawbacks. For example, a small number of people may experience red eyes for the first time and need some time to get used to them. Silicon hydrogel lenses are a bit thicker than normal lenses, so the foreign body sensation may be slightly more pronounced. The lens is more slippery, take off not quite easily, need certain skill just go. However, it is undeniable that silicon hydrogel is the most healthy contact lens at present. It is not for no reason that it is loved and respected by everyone. If you can accept its price, it is still worth trying.