Hard and fast contact lens or soft contact lens which is good?

Although we usually say that contact lenses usually refer to soft contact lenses, but in fact, soft contact lenses are only a classification of contact lenses, corresponding to hard contact lenses. Because soft contact lenses are more common in the market and use a wide range of groups, so people do not know much about hard contact lenses. Today, through the comparison between the two, we will take a look at soft contact lenses and hard contact lenses.

In terms of material, soft and hard contact lenses belong to the polymer organic polymer, this material is good hydrophilic, high water content, so the biocompatibility is also better. As the latest material of soft contact lenses, silicon hydrogel is improved on the basis of hydrogel material. Silicon molecules are added to provide a more convenient delivery channel for oxygen. Therefore, while inheriting the advantages of hydrogel, the oxygen permeability is further improved, getting rid of the limitation of water content for oxygen permeability. The material of hard contact lenses is RGP, mainly through silicon and fluorine to improve oxygen permeability, which is several times higher than that of soft contact lenses, which is more conducive to eye health protection.

The difference in material also makes the different texture characteristics. As the name suggests, soft contact lenses are tough and particularly soft, but the texture of hard contact lenses is relatively hard, so their correction and wearing methods are also quite different. Soft contact lenses for instant correction, like glasses only when wearing lenses have corrective effect, but hard contact lenses is to wear before bed, through a certain hardness of the lens to change the curvature of the cornea, so you can make the correction effect continues for a period of time, so after removing the lens in the morning, correct vision still can continue to maintain about all day.

Although they are also medical devices, there are rich channels for the purchase and inspection of soft contact lenses. Early arers can experience the one-stop service of inspection and distribution offline, while often wearers generally choose online channels to seek cost performance and choose more diverse styles. At present, hard contact lenses can only be tested and matched in some eye hospitals, with high price, long process, but better safety and adapt to a wider range of people. Nevertheless, both are in the note that use still basically consistent, should pay attention to clean and hygienic.