The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 10, 2020
Filed:
Oct. 30, 2017
Novartis Ag, Basel, CH;
Sarah Unterkofler, Hanau, DE;
Susanne Fechner, Aschaffenburg, DE;
Marcus Heift, Aschaffenburg, DE;
Matthias Schwab, Amorbach, DE;
Alcon Inc., Fribourg, CH;
Abstract
A method for determining the inversion state of a soft contact lens (), comprising imaging a soft contact lens having a convex surface () and a concave surface (), a lens center and a lens edge () surrounding said soft contact lens (), the method comprising using an optical coherence tomography system to obtain at least one sectional image of at least a part of the contact lens () comprising the lens edge (), determining a cross-sectional edge geometry of the contact lens () extending from the lens edge () towards the lens center of the contact lens in the sectional image, the cross-sectional edge geometry corresponding to the convex and concave surface boundaries of the contact lens () in the sectional image, selecting a parameter defining the cross-sectional edge geometry of the contact lens () imaged and comparing the parameter defining the cross-sectional edge geometry of the contact lens () with a predetermined parameter defining a cross-sectional edge geometry of a non-inverted contact lens to determine whether said contact lens () is inverted.