Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies
if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the
same subfield and year (this is the minimum needed to enter the top 1%, not the average
within it), or reaches the top citation threshold in at least one of its specific research
topics.
Subretinal electronic chips allow blind patients to read letters and combine them to words
2010626 citationsEberhart Zrenner, Karl Ulrich Bartz‐Schmidt et al.Proceedings of the Royal Society B Biological Sciencesprofile →
Peers — A (Enhanced Table)
Peers by citation overlap · career bar shows stage (early→late)
cites ·
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Countries citing papers authored by Udo Greppmaier
Since
Specialization
Citations
This map shows the geographic impact of Udo Greppmaier's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Udo Greppmaier with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Udo Greppmaier more than expected).
This network shows the impact of papers produced by Udo Greppmaier. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Udo Greppmaier. The network helps show where Udo Greppmaier may publish in the future.
Co-authorship network of co-authors of Udo Greppmaier
This figure shows the co-authorship network connecting the top 25 collaborators of Udo Greppmaier.
A scholar is included among the top collaborators of Udo Greppmaier based on the total number of
citations received by their joint publications. Widths of edges
represent the number of papers authors have co-authored together.
Node borders
signify the number of papers an author published with Udo Greppmaier. Udo Greppmaier is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Gekeler, Florian, Helmut Sachs, Veronique Kitiratschky, et al.. (2013). Re-alignment and explantation of subretinal prostheses: surgical aspects and proteomic analyses. 54(15). 1036–1036.1 indexed citations
6.
Zrenner, Eberhart, Karl Ulrich Bartz‐Schmidt, Florian Gekeler, et al.. (2012). Seeing With Subretinal Electronic Implants: Study in Ten Patients With Wireless Implant Alpha-IMS. Investigative Ophthalmology & Visual Science. 53(14). 6948–6948.3 indexed citations
Zrenner, Eberhart, Udo Greppmaier, Christoph Kernstock, et al.. (2011). Improvement of Visual Orientation and Daily Skills Mediated by Subretinal Electronic Implant Alpha IMS in Previously Blind RP Patients. Investigative Ophthalmology & Visual Science. 52(14). 457–457.3 indexed citations
10.
Wilke, Robert, Udo Greppmaier, Katarína Štingl, & Eberhart Zrenner. (2011). Fading Of Perception In Retinal Implants Is A Function Of Time And Space Between Sites Of Stimulation. Investigative Ophthalmology & Visual Science. 52(14). 458–458.12 indexed citations
11.
Štingl, Katarína, Udo Greppmaier, Anna Bruckmann, et al.. (2011). Vision Mediated by the Subretinal Implant: Improvement for Activities of Daily Living - Preliminary Results. Investigative Ophthalmology & Visual Science. 52(14). 456–456.2 indexed citations
12.
Kusnyerik, Ákos, Udo Greppmaier, Robert Wilke, et al.. (2010). Results of the Preoperative Planning Procedure Before Subretinal Prosthesis Implantation in Humans. Investigative Ophthalmology & Visual Science. 51(13). 3024–3024.1 indexed citations
13.
Zrenner, Eberhart, Heval Benav, Udo Greppmaier, et al.. (2010). Electronic Implants Provide Continuous Stable Percepts in Blind Volunteers Only if the Image Receiver is Directly Linked to Eye Movement. Investigative Ophthalmology & Visual Science. 51(13). 4319–4319.5 indexed citations
14.
Wilke, Robert, Udo Greppmaier, Alex Harscher, Heval Benav, & Eberhart Zrenner. (2010). Factors Affecting Perceptual Thersholds of Subretinal Electric Stimulation in Blind Volunteers. Investigative Ophthalmology & Visual Science. 51(13). 2026–2026.7 indexed citations
Kusnyerik, Ákos, Udo Greppmaier, Uwe Klose, et al.. (2008). Preoperative 3D Planning of Implantation of a Subretinal Prosthesis Using MRI Data. Investigative Ophthalmology & Visual Science. 49(13). 3025–3025.2 indexed citations
20.
Zrenner, Eberhart, Robert Wilke, Karl Ulrich Bartz‐Schmidt, et al.. (2007). Psychometric Analysis of Visual Sensations Mediated by Subretinal Microelectrode Arrays Implanted Into Blind Retinitis Pigmentosa Patients. Investigative Ophthalmology & Visual Science. 48(13). 659–659.20 indexed citations
Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive
bibliographic database. While OpenAlex provides broad and valuable coverage of the global
research landscape, it—like all bibliographic datasets—has inherent limitations. These include
incomplete records, variations in author disambiguation, differences in journal indexing, and
delays in data updates. As a result, some metrics and network relationships displayed in
Rankless may not fully capture the entirety of a scholar's output or impact.