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:
Jul. 13, 2021
Filed:
Aug. 02, 2018
Elrise Corporation, Tochigi, JP;
Yoshiro Okazaki, Tokyo, JP;
Mamoru Iwabuchi, Tokyo, JP;
Toshiyuki Ookubo, Tokyo, JP;
Tatsuki Takenaga, Tokyo, JP;
Taku Miyake, Tokyo, JP;
Norihiko Yokoi, Kyoto, JP;
ELRISE CORPORATION, Tochigi, JP;
Abstract
An ophthalmic measurement device and measurement system include a projection unit projecting an image on tear fluid accumulated at an edge of an eyelid and a surface of a cornea and conjunctiva; an imager takes a picture of the tear fluid accumulated at an edge of an eyelid and the surface of a cornea and conjunctiva; and a calculator determines a physical quantity of the tear fluid accumulated at an edge of an eyelid. The calculator acquires a physical quantity of a first reflection of the image projected on the tear fluid accumulated at an edge of an eyelid, and calculates a curvature radius of the surface of the tear fluid, from a distance between the projection unit and the surface of the tear fluid obtained by distance measurement, a physical quantity of the image, and the physical quantity of the first reflection.