Professor John Marshall is the Frost Professor of Ophthalmology at the Institute of Ophthalmology in association with Moorfield's Eye Hospital, University College London. He is Emeritus Professor of Ophthalmology at Kings College London, Honorary Distinguished Professor University of Cardiff, Honorary Professor the City University and Honorary Professor Glasgow Calendonian University. His research over the past forty years has ranged over a number of ocular problems but has concentrated on the inter-relationships between light and ageing, the environmental mechanisms underlying age-related, diabetic and inherited retinal disease, and the development of lasers for use in ophthalmic diagnosis and surgery. He invented and patented the revolutionary Excimer laser for the correction of refractive disorders with in excess of 35 million procedures now having been undertaken worldwide. He also created the world’s first Diode laser for treating eye problems of diabetes, glaucoma and ageing. He is editor and co-editor of numerous international journals. He has successfully trained 60 students for higher doctorates. He has been awarded the Nettleship Medal of the Ophthalmological Society of the United Kingdom, the Mackenzie Medal, the Raynor Medal, the Ridley Medal, the Ashton Medal, the Ida Mann Medal and the Lord Crook Gold Medal of the Worshipful Company of Spectacle Makers, the Doyne Medal of the Oxford Congress, the Barraquer Medal of the International Society of Cataract and Refractive Surgery, the Kelman Innovator Award of the American Society for Refractive and Cataract surgery, the Lim Medal of the Singapore National Eye Centre and the Junius-Kuhnt award and Medal for his work on AMD. He has been visiting professor at numerous universities on every continent. He has more than thirty patents and has held posts chairing the medical advisory boards of many international companies and was a director of Diomed for some years, this being the leading supplier of diode laser systems for surgery. He has sat on and chaired many national and international committees* concerned with protecting the public against the possible damaging effects of lasers and other artificial light sources and played the leading role with the ICRC and addressed the United Nations to obtain a Geneva Convention banning the use of anti-personnel laser weapons. He was the Chairman of the Medical and Scientific Advisory Board and Trustee of the British Retinitis Pigmentosa Society 1973-2011, and until 1995 he was Co-Chairman of the Medical and Scientific Advisory Board of the International Retinitis Pigmentosa Association. He is the scientific adviser to the National Eye Research Centre. He is a Fellow of the Royal College of Pathologists, a Fellow of the Association for Research in Vision and Ophthalmology and has been elected a Fellow of the Academy of Medical Sciences and a Fellow of the Institute of Biology. He is also an Honorary Fellow of the Royal College of Ophthalmologists, an Honorary Fellow of The College of Optometrists, a Fellow and Director of the Laser Institute of America, a Fellow of the Royal Society of Arts and an Honorary Fellow of Cardiff University. He has a Senior Achievement Award of the American Academy of Ophthalmology and the Euretina Award of the European Society of Retinal Surgeons. In 2009 he was honoured with a Lifetime Achievement Award by the International Society of Cataract and Refractive Surgery and the American Academy of Ophthalmologists. He is also a Fellow of several national ophthalmological societies, as well as being elected to the European Academy of Ophthalmology. Between 2011-2012 he was the Master of the Worshipful Company of Spectacle Makers. In 2013 he was awarded the MBE in the 2013 New Year Honours List for services to Ophthalmology and an honorary DSc from Glasgow University. In 2014 he has been awarded the Zivojnovic award by the European Vitreo Retinal Society, a lifetime achievement award by the UK & I
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Evolution over the last 10 years of activity
Aggregated career metrics
566
Total documents
2.51
Normalized Impact
127
Highly Cited Papers (10%)
15.9
International Collab. (%)
Most cited publications
Main coauthors
Following you can review John's accomplishments in each of the dimensions.
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Dimensions One by One
Spanning 73 diverse indicators, the dimensions considered capture a comprehensive spectrum of academic
attributes.
Each dimension includes a set of indicators and has a especific weight on the One Index.
More information here...
Activity
996
/1000
Reflects an author's research output.
Impact
957
/1000
Reflects an author's academic visibility and the exceptional quality and influence of their most highly cited works.
Excellence
955
/1000
Reflects an author's academic visibility and the exceptional quality and influence of their most highly cited works.
Leadership
880
/1000
Reflects an author's efforts and commitment in leading research initiatives.
Cooperation
858
/1000
Reflects a researcher's ability to navigate and thrive in varied academic and research environments, highlighting adaptability, resourcefulness, and the capacity to build and maintain collaborative relationships across the spectrum of their career.
Openness
856
/1000
Reflects an author's commitment to making their research freely accessible and open to the public.
Community Support
0
/1000
Reflects an author's contributions to the academic community beyond their own research.
Community Recognition
0
/1000
Reflects the academic community's acknowledgment and appreciation of an author's contributions.
Transference
883
/1000
Reflects an author's commitment to making their research a practical application and real-world impact of an author's research.
Fundraising
0
/1000
Reflects an author's ability in securing project funding from major global entities, showcasing your ability to drive research initiatives forward.
All indicators
Performance
Activity
Reflects an author's research output.
| Documents | 566 | Count of all document types. |
|---|---|---|
| Docs/Year | 3.25 | Average of documents published by author per year. |
| Citable docs | 526 | Count of journal articles, proceeding papers and reviews. |
| Journal Articles | 506 | Documents published as articles in scientific journals usually peer-reviewed. |
| Conferences | 2 | Original article reporting data presented at a conference or symposium. |
| Reviews | 18 | Review papers authored by the researcher. |
| Patents | 0 | Intellectual property that gives its owner the legal right to exclude others from making, using, or selling an invention for a limited period of time in exchange for publishing an enabling disclosure of the invention. |
| Theses | 0 | Document submitted in support of candidature for an academic degree or professional qualification presenting the author's research and findings |
| Books | 1 | A whole monograph or the entire book. |
| Book Chapters | 0 | Complete chapter in a book or book series volume where the item is identified as a chapter by a heading or section indicator. |
| Datasets | 3 | Number of dataset where the author have contributed to the creation. |
| Editorials | 3 | Papers where the author contributed editorial content. |
| Reports | 0 | Research reports or white papers authored. |
| Grants | 0 | Research projects funded through external grants awarded to the author. |
| Pre-Prints | 3 | Number of publications freely available in pre-print format. |
| Clinical Trials | N/A | Number of clinical trials where the author has participated. |
| Other types | 0 | Other type of documents. |
Impact
Reflects an author's academic visibility and the exceptional quality and influence of their most highly cited works.
| Citations | 27481 | Total number of citations to all the publications attributed to the author (all types). |
|---|---|---|
| Self Citations | 777 | Citations where the author references their own previous work. |
| Self Citation Rate | 2.827 | Percentage of self-citations in the author's total citation count. |
| Non Self Citation Rate | 97.173 | Percentage of citations received from sources that are not self-citations. |
| Hot Citations | 218 | Total number of citations recieved in the last 6 months. |
| Citations/Document | 48.55 | Average of citations recieved per document. |
| % Not Cited | 0.0 | Percentage of documents with no citations recieved. |
| Relative Citation Index | 2.505 | Item oriented indicator consisting of the quotient between the number of citations to a given work and the average number of citations to works of the same type, year and discipline. An author's RCI corresponds to the average of the values of his/her publications. |
| Journal Relative Citation Index | 2.63 | Item oriented indicator consisting of the quotient between the number of citations to a given work and the average number of citations to works of the same type, year and journal. An author's RCI corresponds to the average of the values of his/her publications. |
| H Index | 78 | Maximum value of h such that the given author has published at least h papers that have each been cited at least h times. |
| G Index | 150 | Maximum value of g such that the given author has published at least g papers that have each been cited at least g^2 times. |
| i10 Index | 335 | Number of documents with at least 10 citations recieved. |
Excellence
Reflects an author's academic visibility and the exceptional quality and influence of their most highly cited works.
| Citation Score | 0.657 | Ratio between 0 and 1 being 0 corresponding to the citation percentile being 0 the 0th and 1 the 100th. |
|---|---|---|
| Citation Normalized Percentile | 0.658 | Citation percentile normalized to 1 (0 worst, 1 best) of the position in citations rankin within the field. Provided by OpenAlex. |
| Higly Cited Papers (top 10%) | 127 | Count of publications falling on or above the 90th citation percentile in the cohort of publications of the same type, year and discipline. |
| Relative Higly Cited Papers | 2.244 | Quotient between the real number of Highly Cited Papers (HCP) and expected number of HCP's that is the 10% of total documents. |
| Outstanding Papers (top 1%) | 19 | Count of publications falling on or above the 99th citation percentile in the cohort of publications of the same type, year and discipline. |
| Relative Outstanding Papers | 3.357 | Quotient between the real number of Outstanding Papers (OP) and expected number of OP's that is the 1% of total documents. |
| Outstanding Papers (top 0.1%) | 2 | Count of publications falling on or above the 99.9th citation percentile in the cohort of publications of the same type, year and discipline. |
| Hot Papers | 28 | Using only the citations recieved in the last 6 months: documents falling on or above the 99th citation percentile in the cohort of publications of the same type, year and discipline. |
Interaction within community
Leadership
Reflects an author's efforts and commitment in leading research initiatives.
| Docs Leadership | 388 | Number of documents lead by the author. |
|---|---|---|
| % Leadership | 68.55 | Percentage of documents lead by the author. |
| Docs International Leadership | 48 | Number of documents in international collaboration lead by the author. |
| % International Leadership | 8.48 | Percentage of documents in international collaboration lead by the author. |
| Principal Investigator | N/A | Number of times where the author served as the lead researcher in a project. |
| Associations Founded | N/A | Number of associations founded by the author. |
| Societies Founded | N/A | Number of scientific or professional societies established by the author. |
| Foundations Founded | N/A | Number of research-related foundations established by the author. |
| Councils | N/A | Number of councils founded by author. |
Cooperation
Reflects a researcher's ability to navigate and thrive in varied academic and research environments, highlighting adaptability, resourcefulness, and the capacity to build and maintain collaborative relationships across the spectrum of their career.
| Authors/Paper | 8.78 | Average number of authors per document. |
|---|---|---|
| % Highly Authored Papers | 0.71 | Percentage of documents with 25 or more authors. |
| Countries/Paper | 1.01 | Average number of different countries in the author's affiliation line per document. |
| Docs International Collaboration | 90 | Number of documents reporting two or more different countries in the author's affiliation line. |
| % International Collaboration | 15.9 | Percentage of documents reporting two or more diffetent countries in the author's affiliation line. |
Community Support
Reflects an author's contributions to the academic community beyond their own research.
| Peer Review Counts | 0 | Number of times the author peer-reviewed publications. |
|---|---|---|
| Society Membership | N/A | Number of societies of wich the author is a member. |
| Society Memberships | N/A | Memberships held by the author in scientific or professional societies. |
| Editorial Board Memberships | N/A | Number of journals where the author has been member of editorial board. |
| Panelists | N/A | Number of times the author have been a panelist in the European Research Council (ERC) calls. |
Community Recognition
Reflects the academic community's acknowledgment and appreciation of an author's contributions.
| Distinctions | 0 | Number of times the author have recieved a distinction for its career. |
|---|---|---|
| Invitations | N/A | Number of times the author has been invited to talks, professorships, expositions or demonstrations. |
| Talks | N/A | Number of times the author has been invited to talks. |
| Professorships | N/A | Number of times the author has been invited to professorhips. |
| Commissioned Reports | N/A | Commissioned reports done by the author. |
Interaction with society
Openness
Reflects an author's commitment to making their research freely accessible and open to the public.
| Open Access Documents | 168 | Number of documents in Open Access mode. |
|---|---|---|
| % Open Access Documents | 29.68 | Percentage of documents in Open Access mode. |
| Open Access Gold | 14 | Number of documents published in an OA journal that is indexed by the DOAJ. |
| Open Access Green | 27 | Toll-access on the publisher landing page, but there is a free copy in an OA repository. |
| Open Access Hybrid | 6 | Free under an open license in a toll-access journal. |
| Open Access Bronze | 118 | Free to read on the publisher landing page, but without any identifiable license. |
| Open Access Closed | 398 | Non Open Access documents. |
Transference
Reflects an author's commitment to making their research a practical application and real-world impact of an author's research.
| Patents | 0 | Intellectual property that gives its owner the legal right to exclude others from making, using, or selling an invention for a limited period of time in exchange for publishing an enabling disclosure of the invention. |
|---|---|---|
| Advisory Boards | N/A | Number of advisory boards of which the author is member. |
| Companies | N/A | Number of companies created or founded by the author. |
Fundraising
Reflects an author's ability in securing project funding from major global entities, showcasing your ability to drive research initiatives forward.
| Funding Counts | N/A | Number of activities reported as funding recieved. |
|---|---|---|
| ERC Grantees | N/A | Researchers awarded grants from the European Research Council. |