The method of eyeglass lenses processing and a device for its performing
A V Shishkin , A V Korepanov , A V Petrov , A V Akhkiyamova
Kazan medical journal ›› 2017, Vol. 98 ›› Issue (3) : 412 -414.
The method of eyeglass lenses processing and a device for its performing
Aim. To develop an inexpensive and efficient method of increasing the hydrophilicity of the lens surface and a device for its implementation.
Methods. To implement the claimed method, a gas discharge device was created. Processing of glasses with plastic lenses in a high-frequency gas discharge (cold plasma) was performed in 47 myopes and 43 hypermetropes. Gas discharge was generated under the following conditions: 1 MHz, 10-20 W, pressure of 0.3-0.01 mm Hg. Processing was carried out for 30-900 seconds. As a result hydrophilic properties of the lens surface were observed in all processed lenses.
Results. On the surface of the lenses a large number of hydrophilic functional groups are formed so during water vapour condensation the formation of a water film occurs instead of forming microdrops. Thus, transparency of the lenses is not disturbed. The hydrophilic properties of the lens surface was maintained in an average for 3-4 weeks. Gas discharge eyeglass lens processing provides a long-term effect of eyeglass lens unsteaming, mechanical stability and safety of the surface, reliable exploitation of the glasses.
Conclusion. We have proposed a fundamentally different way of physical-chemical modification of the lens surface, which is not inferior to existing methods but produces significantly better results.
lenses / gas discharge procesing / hydrophilic surface
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Shishkin A.V., Korepanov A.V., Petrov A.V., Akhkiyamova A.V.
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