The application of silicone hydrogel in ophthalmic medical

Silicone hydrogel is a kind of high molecular material used in ophthalmic medical treatment, which has important applications in lenses, artificial corneas, drug sustained-release carriers and other aspects. Its unique silicone-oxygen structure makes its oxygen permeability significantly higher than traditional hydrogel materials When it is used to make contact lenses, it allows more oxygen to pass through the lens to the cornea, maintaining the normal metabolism and physiological functions of the cornea, reducing such as corneal edema and neovascularization caused by hypoxia, thereby improving the safety and comfort of wearing and suitable for long-term wearing. At the time, silicone hydrogel materials can combine a large amount of water, keep the surface of the contact lens moist, reduce tear evaporation, and reduce the dry feeling during wearing. Itsizing performance is also helpful in maintaining the stability of the tear film on the corneal surface, reducing the risk of eye discomfort and infection. In addition, since silicone hydro has good biocompatibility with human tissues, silicone hydrogel can also be used as an artificial cornea. After implantation into the eye, it can reduce immune and inflammatory reactions lower the risk of rejection. Its optical properties are stable, and it can clearly transmit light, providing patients with better visual recovery effects. Due to the fact that silicone hydrogel certain strength and elasticity, it can maintain a stable shape in the eye, resist the pressure in the eye and external shocks, and is not easy to deform or rupture At the same time, it also has good abrasion resistance, and can play a long-term role in the eye. So, what are the advantages of silicone hydro in the application of drug sustained-release carriers? Firstly, silicone hydrogel can achieve controlled release of drugs by adjusting the composition and structure of the material. By wrapping the in the silicone hydrogel, the drug can be slowly and continuously released according to the treatment needs of ophthalmic diseases, prolonging the action time of the drug in the eye improving the efficacy of the drug, reducing the number of drug administrations and facilitating the use of patients. By surface modification of silicone hydrogel, it can have the targetability ocular tissues. For example, by combining specific ligands or antibodies, the drug carrier can accurately act on the lesion site, increasing the local concentration of the drug and reducing side effects on other normal tissues of the eye. It can be seen that the role of silicone hydrogel in ophthalmic medical field is not to be underestimated