Title:
MULTIIFOCUS OPHTHALMIC LENS
Document Type and Number:
Japanese Patent JPS54104854
Kind Code:
A
Abstract:
A multifocal spectacle lens having a single base lens member and at least two additional parts adjacent to each other, attached to the base lens member by fusing or cementing. These additional parts are so shaped that imaginary tangential planes lying in the center of separation lines between the additional parts and tangential to the curved surfaces which effect changes in power extend in pairs of planes which are parallel to each other, in a manner to avoid any jump in the image when the line of sight moves from one of the additional parts to the adjacent additional part.
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Inventors:
ERUBUIN YOTSUTO DANIIRUSU
JIIKUFURIITO KORUN
JIIKUFURIITO KORUN
Application Number:
JP230179A
Publication Date:
August 17, 1979
Filing Date:
January 16, 1979
Export Citation:
Assignee:
ZEISS STIFTUNG
International Classes:
G02B3/10; G02C7/06; (IPC1-7): G02B3/10; G02C7/06