What are the disadvantages of silicon hydrogel contact lenses?
Silicon hydrogel contact lenses are highly recommended by wearers because of their high oxygen permeability, and their share in the domestic market is gradually increasing. It meets consumers' requirements for healthier contact lens wearing, which can be said to be a great breakthrough in the development of contact lens materials. So is there a downside to silicon hydrogel contact lenses?
Due to the nature of the material, silicon hydrogel contact lenses may bring a stronger foreign body feeling. Silicon hydrogels are thicker than hydrogels, and even people who are used to wearing contact lenses can feel them in their eyes. While the addition of silicon improves oxygen permeability, it causes the lenses to harden, and the more silicon added, the harder the lenses become, so it may take longer to get used to them for the first time, and less for the eyes if they are too sensitive.
Removing silicon hydrogel contact lenses also stumped many people. Lens itself wetter degree is higher, can have kind of draw the feeling on eyeball, when taking very easy to slip, press not to also pinch not to come down the circumstance often happens. So we need to be patient, dry your fingers, or try to push the lens to the white of the eye and then remove it, so as not to scratch the cornea.
Silicone hydrogel contact lenses are easy to absorb lipid precipitation. Although silicon hydrogel lenses can reduce the deposition of proteins to a certain extent, due to the fact that silicon element is relatively greasy, lipid precipitation is easy to adhere to the lens surface, which is also difficult to completely remove, and is also prone to the pollution of skin, cosmetics and other oils.
Silicon hydrogel contact lenses do have some drawbacks, but they still outweigh them. In the future, silicon hydrogel lens with short period and high oxygen permeability will become the mainstream product.