Hydron America was the first contact lens company to receive FDA approval for cast-molding contact lenses in 1994,
and also the first one which mass-produces lenses with a cost-effective approach whilst maintaining a high level of quality.
In 1995, Ginko International Co., Ltd took over Hydron America and established Haichang Contact Lenses Co., Ltd.,
which soon has become the No. 1 in the market. In 2011, Haichang Contact Lenses Co., Ltd established Yung Sheng Optical Co., Ltd in Taichung,
Taiwan and listed on Taiwan stock exchange the next year. The factory, located in Central Taiwan Science Park, is a high-tech large-scale factory
with GMP & ISO certification. With its innovative R&D team and advanced manufacturing facilities, the production is estimated to be up to
two hundred million lenses a year. With the commitment to bringing the best vision care to the world, Yung Sheng Optical Co., Ltd will continue to
advance the comfort technologies while sustaining its strict quality management.