专利名称：Progressive addition lenses
发明人：Ronald D. Blum,Russell A. Chipman,Amitava
Gupta,Edgar Vithal Menezes
申请号：US09/146888申请日：19980903公开号：US06086203A公开日：20000711
摘要：The invention provides progressive addition lenses in which lens unwantedastigmatism is reduced and channel width through the intermediate and near vision zonesis increased as compared to conventional progressive addition lenses. This result isachieved by combining a progressive addition surface with a first dioptric add power withat least one optical element that provides additional dioptric add power to the lens.
申请人：JOHNSON & JOHNSON VISION CARE, INC.
代理人：Lois A. Gianneschi
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