Top 20 Key Players companies in Keratometer by Most Patent Filings in the world in 2021 – Discovery

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The Keratometer top 20 is Discovery PatSnap’ annual ranking of the top 20 Most Patent Filings Keratometer Key Players in the world. Discovery has identified the top key players, startups & unicorns, fast-growings, news entrants in 2021, ranking from differnt perspectives, including patent filing intensity, academic research capability, news media heat. The company list is generated from various data types.

A keratometer, also known as an ophthalmometer, is a diagnostic instrument for measuring the curvature of the anterior surface of the cornea, particularly for assessing the extent and axis of astigmatism. It was invented by the German physiologist Hermann von Helmholtz in 1851, although an earlier model was developed in 1796 by Jesse Ramsden and Everard Home. A keratometer uses the relationship between object size (O), image size (I), the distance between the reflective surface and the object (d), and the radius of the reflective surface (R).

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1	Carl Zeiss Meditec, Inc.	California, United States	Glaucoma,Medicine,Ophthalmology, ...[+2]	Patent: 17
2	Canon, Inc.	Tokyo, Japan	Computer hardware,Software,Computer vision, ...[+2]	Patent: 12
3	LENSAR, Inc.	United States	Medical equipment,Laser,Hospitality industry, ...[+2]	Patent: 10
4	Globechek Enterprises LLC	United States	Information technology consulting	Patent: 8
5	OCULUS Optikgeräte GmbH	Hessen, Germany	Medical instruments,Medicine,Medical equipment, ...[+2]	Patent: 7
6	Visionix Ltd.	Jerusalem, Israel	Medical equipment,Wavefront,Health care, ...[+2]	Patent: 7
7	Topcon Corp.	Tokyo, Japan	Electronics,Survey instrument,Food shortage, ...[+2]	Patent: 6
8	Huvitz Co., Ltd.	Gyeonggi-do, South Korea	Medicine,Medical equipment,Projector, ...[+2]	Patent: 6
9	Humphrey Instruments, Inc.	CA, US	Dashboard,Health care	Patent: 6
10	LaserSight Technologies, Inc.	FL, US	Semiconductor,Electronics,Eye surgery, ...[+2]	Patent: 6
11	EssilorLuxottica SA	Île-de-France, France	Eyewear,Product design,Health care, ...[+2]	Patent: 5
12	Alcon Laboratories, Inc.	Genève, Switzerland	Medical equipment,Health care,Ophthalmic drugs, ...[+2]	Patent: 4
13	Carl Zeiss Jena GmbH	Germany	Photography,Medicine,Health care	Patent: 4
14	Nidek Co., Ltd.	Aichi, Japan	Surgical lasers,Medical equipment,Medicine, ...[+2]	Patent: 3
15	Ovitz Corp.	New York, United States	Vision problem,Medicine,Sight	Patent: 3
16	Tomey Co. Ltd.	Aichi, Japan	Medical equipment,Medicine	Patent: 3
17	Tomy Co., Ltd.	Tokyo, Japan	Video game	Patent: 2
18	Reichert, Inc.	New York, United States	Diagnostic instrument,Glaucoma,Medical equipment, ...[+2]	Patent: 2
19	Pro Fit Optix, Inc.	Texas, United States	Eyewear,Health care	Patent: 2
20	Clement Clarke International Ltd.	Essex, United Kingdom	Medical instruments,Medical equipment,Medicine, ...[+2]	Patent: 2