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:
Aug. 03, 2021
Filed:
May. 31, 2017
The General Hospital Corporation, Boston, MA (US);
Alfred Vogel, Luebeck, DE;
Norbert Linz, Luebeck, DE;
Sebastian Freidank, Luebeck, DE;
Reginald Birngruber, Luebeck, DE;
The General Hospital Corporation, Boston, MA (US);
Abstract
The invention relates to an apparatus for changing the refractive power of the cornea (), in particular for correcting hyperopia or presbyopia, exhibiting injection means () having at least one hollow needle () for injecting at least one optically transparent filling material having a predetermined refractive index into an intrastromal corneal pocket (), characterized by a controllable injection drive () that is coupled at least indirectly to the injection means () and is designed for changing an amount, to be injected, of the at least one filling material; a device for optical coherence tomography (OCT) () that is designed for monitoring the area of the corneal pocket () by means of measurement of depth profiles of the cornea () on a repeatedly cycled-through scan pattern; and a computing unit () that is designed and/or configured to determine from the measurement data of the OCT device () at least the radius of curvature of the front () of the cornea () keeping pace temporally with the repetitions of the scan pattern cycle during the injection, wherein the computing unit () is designed and/or configured to control the injection drive () for changing the injected amount of the at least one filling material, and namely on the basis of the radius of curvature of the front () of the cornea () and/or such until a predetermined target criterion is fulfilled.