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:
Apr. 21, 2026
Filed:
Jun. 09, 2023
Optomed Plc, Oulu, FI;
Ilkka Alasaarela, Oulu, FI;
Matti Pohjoisaho, Oulu, FI;
OPTOMED PLC, Oulu, FI;
Abstract
An ophthalmic apparatus comprises an alignment arrangement, which outputs rays of alignment light of a first alignment pattern in a converging manner toward a first target plane, forms a predetermined reflection pattern of the first alignment pattern on said first target plane based on the convergence, causes the rays of the alignment light to have an alignment light waist zone that includes the first target plane based on the convergence, causes a reflection pattern of the first alignment pattern outside the first target plane to deviate from the predetermined reflection pattern based on the convergence. A communication interface of the ophthalmic apparatus outputs information on the reflection pattern of the first alignment pattern reflected from said a posterior surface of the crystalline lens of the eye when the ophthalmic apparatus is directed toward the eye for guiding and/or controlling a user based on the reflection pattern of the first alignment pattern that is varying with the position of the posterior surface of the crystalline lens on said posterior surface to find the working distance from the eye where the predetermined shape of the first alignment pattern is on said posterior surface.