Method For Providing An Optical System Of An Ophthalmic Spectacle Lens And Method For Manufacturing An Ophthalmic Spectacle Lens
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United States of America Patent
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Issued Date -
Oct 30, 2014
app pub date -
Nov 16, 2012
filing date -
Nov 16, 2011
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
Method for providing an optical system (OS) of an ophthalmic spectacle lens according to wearer's prescription data and wearer's optical needs with the provision that a wearer's optical need is not related to prescription data, where said optical system (OS) is defined by at least a front and a back surfaces (S1, S2) and their relative position, comprising the steps of: a) providing a semi-finished lens blank (SB); b) providing contour data (CD); c) choosing at least one localized optical feature (LOFi) suitable for the wearer's needs; d) positioning the contour data (CD)
- wherein the semi-finished lens blank (SB) comprises: a first surface (SB1) having in each point a mean sphere value (SPHmean) and a cylinder value (CYL), a second unfinished surface, the first surface (SB1) comprising: a plurality of primary areas (Ai); border areas (Bi); and a secondary area.
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