发明名称 Eyeglass display rack with vision tester
摘要 A vision tester comprising a front wall and a back wall. Printed matter comprising words appears on the back wall, which is approximately 14 inches (35.6 cm.) from the front wall. The printed matter is exposed to ambient light from the top and front. The front wall has an opening through which the user of the vision tester looks. A plurality of magnifying lenses, of different diopter ratings, are selectively positionable behind the opening. Indicia appear to indicate the diopter rating of each lens. The user of the vision tester can determine the diopter rating of the appropriate lens needed for reading by determining which lens renders the printed matter clear and readable.
申请公布号 US5861941(A) 申请公布日期 1999.01.19
申请号 US19970818272 申请日期 1997.03.18
申请人 DIVERSIFIED PRODUCTS, INC. 发明人 LIEBERS, STEVEN B.;LIEBERS, BORIS B.
分类号 A61B3/04;A61B3/18;(IPC1-7):A61B3/00;A61B3/02 主分类号 A61B3/04
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