It is a prosthetic eye made of cryolite special glass material produced in the German Rausa area. Its material is a functional glass-ceramic material, which is superior to ordinary glass, ceramic and natural stone. It is non-ionic neutral without electricity. Inorganic materials, physicochemical properties are extremely stable, do not release any harmful substances, wear and corrosion resistance, biocompatibility and biological activity is very good, the material shows extremely smooth, good wettability, does not cause allergic inflammatory reaction of human tissue, after more than 170 years Prosthetic eye materials that are clinically used, fully validated, and currently the best in the world. This Yiyan product was first introduced to China in July 2004 by Lausha Glass Yiyan and the Tongji Hospital Ophthalmology Hospital of Huazhong University of Science and Technology. In May 2005, it was officially put into the Chinese market.
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