Surface plasma treatment equipment silicone hydrogel contact lens surface treatment:
The surface treatment of silicone hydrogel contact lenses is a method to improve the surface of contact lenses to increase their wettability and reduce their sensitivity to protein and lipid deposition during use. Surface plasma treatment equipment is the result of its surface treatment is to form a silicate-containing surface film or covering layer.
Contact lenses made of silicone-containing materials have been studied for many years. Generally, such materials can be divided into two categories: hydrogels and non-aqueous gels. Non-hydrogels cannot absorb an appropriate amount of water, while hydrogels can adsorb and retain water in an equilibrium state. Regardless of their water content, non-hydrogel and hydrogel silicone contact lenses tend to have relatively hydrophobic, non-wettable surfaces.

Surface plasma treatment equipment can improve the surface of this type of silicone contact lens so that it can adapt to the eyes. It is known that increasing the hydrophilicity of contact lenses improves their wettability. This in turn is related to improving the wearing comfort of contact lenses. In addition, the surface of the lens will affect the sensitivity of the lens to deposition, especially the deposition of proteins and lipids in the tear fluid during the use of the lens. The accumulated deposits can cause eye discomfort or even inflammation.
For long-wear lenses, the surface is more important. This is because long-wear lenses must be designed to have a high standard of comfort for a long time, without the need to be taken off before going to bed every day lens. In this way, when using contact lenses that can be worn for a long time, the eyes do not have time to recover every day in order to recover from any discomfort or other possible side effects when wearing the lenses.
Plasma has been used to treat the surface of silicone lenses to improve its surface properties. For example, the surface has become more hydrophilic, more resistant to deposition, more resistant to wear, or other improvements.
The method of providing a protective coating on silicone or polyurethane lenses is to subject the lenses to current glow discharge (surface plasma treatment equipment plasma) treatment, that is, first treat the lenses in a hydrocarbon atmosphere during glow discharge. The lens is then treated in an oxygen atmosphere to increase the hydrophilicity of the lens surface.
There is a need to provide a silicone hydrogel contact lens with an optically transparent hydrophilic surface film. The surface film not only has better wettability, but also generally allows silicone hydrogel contact lenses to In the eyes of human beings, use it continuously for a long period of time.
For silicone hydrogel contact lenses that are worn for a long time, it is very necessary to make the contact lenses have a surface that can allow a high degree of oxygen and water penetration. The surface of the lens treated by the plasma surface treatment equipment is very comfortable in actual use, and it will not irritate the cornea or have other side effects on the cornea when the lens is worn for a long time. It would be ideal if the lens with the surface treated in this way can be economically manufactured into an industrially viable product.
Surface plasma treatment equipment is a method to improve the surface of a contact lens to increase its wettability and increase its ability to resist deposition during use. Under appropriate plasma conditions, the lens is treated with oxidative plasma, followed by hydration and autoclaving to obtain such a surface film.