Top 50 Key Players companies in Keratometer by Most Literature Citation in the world in 2021 – Discovery

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The Keratometer top 50 is Discovery PatSnap’ annual ranking of the top 50 Most Literature Citation 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	Vision-Sciences, Inc.	New York, United States	Health care,Deep brain stimulator,Vagus nerve stimulation, ...[+2]	Literature citation: 476
2	Moorfields Eye Hospital NHS Foundation Trust	United Kingdom	Health care,Retinitis,Optical coherence tomography, ...[+2]	Literature citation: 203
3	Cleveland Clinic	OH, US	Health care,Face transplant,Coronary artery bypass surgery, ...[+2]	Literature citation: 191
4	University Health Network	Ontario, Canada	Health care,Hospitality industry,Resident physician, ...[+2]	Literature citation: 186
5	St James's University Hospital	West Yorkshire, United Kingdom	Medicine,Surgery,Internal medicine, ...[+2]	Literature citation: 137
6	U.S. Department of Veteran Affairs	District of Columbia, United States	Health care,National security,Health Insurance Portability and Accountability Act, ...[+2]	Literature citation: 135
7	Bascom Palmer Eye Institute	United States	Health care,Ophthalmology,Cornea, ...[+2]	Literature citation: 135
8	Jules Stein Eye Institute	California, United States	Social network,Health care,Ophthalmology, ...[+2]	Literature citation: 129
9	Manhattan Eye, Ear & Throat Hospital	New York, United States	Health care,Hospitality industry	Literature citation: 128
10	Kaiser Permanente International	California, United States	Managed Care Organization,Managed care	Literature citation: 124
11	Training Vision Institute Pte Ltd.	Central Region, Singapore	Digital marketing	Literature citation: 118
12	Memorial Hospital & Health System	Indiana, United States	Health care,Hospitality industry,Childbirth, ...[+2]	Literature citation: 113
13	Taipei Medical University Hospital	Taiwan Province, China	Patiromer,Biophysics,Medicine, ...[+2]	Literature citation: 112
14	Toronto Western Hospital	Ontario, Canada	Emergency department,Neurosurgery,Hospitality industry, ...[+1]	Literature citation: 92
15	Tan Tock Seng Hospital Pte Ltd.	Central Region, Singapore	Health care,Health department,Emergency department, ...[+2]	Literature citation: 73
16	Madigan Army Medical Center	Washington, United States	Healthcare system,Health care	Literature citation: 69
17	L.V. Prasad Eye Institute	Andhra Pradesh, India	Blindness,Wellness Programs,Health care, ...[+2]	Literature citation: 62
18	Yahoo	Virginia, United States	Advertising,Search engine,Search engine optimization, ...[+2]	Literature citation: 54
19	Helse Bergen HF Haukeland Universitetssjukehus	Hordaland, Norway	Regional hospital,Oncology,Breast cancer, ...[+2]	Literature citation: 52
20	University College London Hospitals NHS Foundation Trust	United Kingdom	Neurosurgery,Neurology,Health care	Literature citation: 44
21	Samsung Medical Center	South Korea	Medical research,Hospitality industry,Health care, ...[+2]	Literature citation: 39
22	Yerkes National Primate Research Center	Georgia, United States	Primate,Health care,Biology, ...[+2]	Literature citation: 36
23	Allergan SpA	Italy	Drug	Literature citation: 36
24	New Delhi Centre For Sight Ltd.	Delhi, India	Health care,Pharmacy and Therapeutics,Sight, ...[+2]	Literature citation: 35
25	The Brigham & Women's Hospital, Inc.	Massachusetts, United States	Health care,Mitral valve surgery,Health equity, ...[+2]	Literature citation: 35
26	Sheba Medical Center	Tel Aviv, Israel	Health care,Intubation,Tracheal tube, ...[+2]	Literature citation: 30
27	Asan Medical Center	South Korea	Health care,Hospitality industry,Antigen-presenting cell, ...[+2]	Literature citation: 29
28	Guangdong General Hospital	Guangdong Sheng, China	Cell therapy,Genetic engineering,Messenger RNA, ...[+2]	Literature citation: 29
29	AmeriCorps VISTA		National service,Biology,Medicine, ...[+2]	Literature citation: 29
30	National Institute for Health Research	United Kingdom	Clinical trial,Research system,Biology, ...[+2]	Literature citation: 26
31	Sankara Nethralaya	Tamil Nadu, India	Vascular surgery,General surgery,Plastic surgery	Literature citation: 26
32	University Health System	Texas, United States	Serial killer,Health care,Public health	Literature citation: 25
33	Cleveland Clinic Lerner Research Institute	Ohio, United States	Genomic medicine,Molecular medicine,Molecular genetics, ...[+2]	Literature citation: 23
34	The Mount Sinai Hospital	New York, United States	Borough,Health care,Hospitality industry, ...[+2]	Literature citation: 22
35	Royal North Shore Hospital		Health care,Hospitality industry,Referral, ...[+2]	Literature citation: 14
36	Mackay Memorial Hospital	Taiwan Province, China	Dendritic cell,Cell sorting,Biochip, ...[+2]	Literature citation: 13
37	Singleton Hospital	United Kingdom	Health care,Hospitality industry	Literature citation: 11
38	Royal United Hospital Bath NHS Trust	Bath and North East Somerset, United Kingdom	Health care,Hospitality industry,City centre, ...[+1]	Literature citation: 10
39	Århus Universitetshospital	Denmark	Medical treatment,Hospitality industry,Health care, ...[+2]	Literature citation: 10
40	Leids Universitair Medisch Centrum	Zuid-Holland, Netherlands	Medical research,Hospitality industry,Health care, ...[+2]	Literature citation: 9
41	University Malaya Medical Centre	Malaysia	Medical institution,Medicine,Internal medicine, ...[+2]	Literature citation: 9
42	The Pennine Acute Hospitals NHS Trust	Manchester, United Kingdom	Health care,Hospitality industry,Medicine, ...[+2]	Literature citation: 8
43	Seoul National University Hospital	South Korea	Emergency department,Healthcare system,Medical tourism, ...[+2]	Literature citation: 7
44	Aalborg University Hospital	Denmark	Social science,Public university,Neurotechnology, ...[+2]	Literature citation: 7
45	Canterbury Hospital	Australia	Local government area,Repatriation	Literature citation: 7
46	Kyung Hee University System	South Korea	Hangul,University system,Paralegal, ...[+2]	Literature citation: 6
47	CARE Hospitals Pvt Ltd.	Andhra Pradesh, India	Health care,Vascular surgery,Anesthesiology, ...[+2]	Literature citation: 5
48	Helsinki University Central Hospital	Finland	Medicine,Internal medicine,Surgery, ...[+2]	Literature citation: 2
49	Rigshospitalet	Hovedstaden, Denmark	Health care,Hospitality industry,Umbilical Cord Blood Stem Cell, ...[+2]	Literature citation: 1
50	Nassau University Medical Center	New York, United States	Trauma center,Medicine,Surgery, ...[+2]	Literature citation: 1