Thomas Kohnen

16.1k total citations
473 papers, 9.5k citations indexed

About

Thomas Kohnen is a scholar working on Ophthalmology, Radiology, Nuclear Medicine and Imaging and Epidemiology. According to data from OpenAlex, Thomas Kohnen has authored 473 papers receiving a total of 9.5k indexed citations (citations by other indexed papers that have themselves been cited), including 363 papers in Ophthalmology, 328 papers in Radiology, Nuclear Medicine and Imaging and 186 papers in Epidemiology. Recurrent topics in Thomas Kohnen's work include Corneal surgery and disorders (291 papers), Intraocular Surgery and Lenses (216 papers) and Ophthalmology and Visual Impairment Studies (178 papers). Thomas Kohnen is often cited by papers focused on Corneal surgery and disorders (291 papers), Intraocular Surgery and Lenses (216 papers) and Ophthalmology and Visual Impairment Studies (178 papers). Thomas Kohnen collaborates with scholars based in Germany, United States and Austria. Thomas Kohnen's co-authors include Jens Bühren, Douglas D. Koch, Martín Baumeister, Oliver K. Klaproth, Daniel Kook, Mehdi Shajari, Myriam Böhm, Kerstin Petermann, Evdoxia Terzi and Burkhard von Jagow and has published in prestigious journals such as SHILAP Revista de lepidopterología, PLoS ONE and Scientific Reports.

In The Last Decade

Thomas Kohnen

432 papers receiving 8.7k citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Thomas Kohnen Germany 55 8.0k 7.5k 4.8k 1.1k 198 473 9.5k
Douglas D. Koch United States 51 7.4k 0.9× 7.4k 1.0× 5.6k 1.2× 1.1k 1.0× 90 0.5× 243 8.7k
Colm McAlinden United Kingdom 38 3.0k 0.4× 3.1k 0.4× 2.6k 0.5× 697 0.6× 147 0.7× 120 4.2k
Jack T. Holladay United States 36 5.8k 0.7× 5.3k 0.7× 4.4k 0.9× 573 0.5× 162 0.8× 104 6.7k
Rudy M.M.A. Nuijts Netherlands 49 4.9k 0.6× 5.0k 0.7× 2.6k 0.6× 1.3k 1.2× 55 0.3× 220 6.4k
Karla Zadnik United States 58 6.3k 0.8× 9.3k 1.3× 7.9k 1.7× 3.0k 2.7× 742 3.7× 195 11.5k
Abbasali Yekta Iran 35 2.9k 0.4× 2.9k 0.4× 2.5k 0.5× 861 0.8× 449 2.3× 279 4.8k
Marie‐José Tassignon Belgium 38 3.1k 0.4× 2.9k 0.4× 1.3k 0.3× 877 0.8× 49 0.2× 209 4.5k
Kyoko Ohno‐Matsui Japan 65 12.8k 1.6× 10.2k 1.4× 6.0k 1.3× 493 0.4× 191 1.0× 329 15.2k
Marcus Ang Singapore 48 5.2k 0.6× 4.9k 0.6× 1.5k 0.3× 1.1k 1.0× 32 0.2× 206 7.2k
Fumiki Okamoto Japan 30 2.4k 0.3× 2.7k 0.4× 1.4k 0.3× 495 0.5× 72 0.4× 147 3.4k

Countries citing papers authored by Thomas Kohnen

Since Specialization
Citations

This map shows the geographic impact of Thomas Kohnen'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 Thomas Kohnen with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Thomas Kohnen more than expected).

Fields of papers citing papers by Thomas Kohnen

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Thomas Kohnen. 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 Thomas Kohnen. The network helps show where Thomas Kohnen may publish in the future.

Co-authorship network of co-authors of Thomas Kohnen

This figure shows the co-authorship network connecting the top 25 collaborators of Thomas Kohnen. A scholar is included among the top collaborators of Thomas Kohnen 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 Thomas Kohnen. Thomas Kohnen is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Kaiser, Klemens Paul, et al.. (2025). Impact of postoperative walking vs lying down on intraocular lens rotation after lens surgery: prospective comparative study. Journal of Cataract & Refractive Surgery. 51(7). 543–548.
2.
Kaiser, Klemens Paul, et al.. (2025). Comparison of 11 Intraocular Lens Power Calculation Formulas in Eyes Undergoing Simultaneous Cataract Surgery and Descemet Membrane Endothelial Keratoplasty. American Journal of Ophthalmology. 277. 295–304. 1 indexed citations
3.
Fronius, Maria, et al.. (2025). Optical coherence tomography (OCT) parameters in amblyopia. Strabismus. 33(4). 247–257.
4.
Kohnen, Thomas, et al.. (2025). Visual performance after implantation of a new trifocal intraocular lens with an advanced hydrophobic acrylic biomaterial. Journal of Cataract & Refractive Surgery. 51(9). 777–783.
5.
Kaiser, Klemens Paul, et al.. (2024). A comparison of cycloplegic effect of cyclopentolate 0.5% versus 1.0% eye drops with five different refraction measurement modalities in young adults. Graefe s Archive for Clinical and Experimental Ophthalmology. 263(4). 1135–1146. 1 indexed citations
6.
Kaiser, Klemens Paul, et al.. (2024). Fellow eye data for intraocular lens calculation in eyes undergoing combined phacovitrectomy. Acta Ophthalmologica. 103(1). e31–e37.
7.
Kaiser, Klemens Paul, et al.. (2024). Biomechanical corneal effects of LASIK Xtra compared with conventional FS-LASIK in high myopic eyes. Journal of Cataract & Refractive Surgery. 51(2). 106–112.
8.
9.
Wendelstein, Jascha, Marina Casazza, Kamran M. Riaz, et al.. (2023). Unilateral intraindividual comparison and bilateral performance of a monofocal spherical and diffractive extended depth of field intraocular lens mix‐and‐match approach. Clinical and Experimental Ophthalmology. 52(1). 31–41. 1 indexed citations
10.
Kohnen, Thomas, et al.. (2023). Vehicle Headlight Halo Simulation of Presbyopia-Correcting Intraocular Lenses. Translational Vision Science & Technology. 12(12). 19–19. 1 indexed citations
11.
Kaiser, Klemens Paul, et al.. (2023). Accuracy of using the axial length of the fellow eye for IOL calculation in retinal detachment eyes undergoing silicone oil removal. British Journal of Ophthalmology. 108(7). 921–926. 2 indexed citations
12.
Kohnen, Thomas, et al.. (2023). ESCRS Clinical Trends Survey 2016–2021: 6-year assessment of practice patterns among society delegates. Journal of Cataract & Refractive Surgery. 49(2). 133–141. 6 indexed citations
13.
Ackermann, Hanns, et al.. (2023). Anterior Segment Biometry in a Caucasian Population with Cataracts. Current Eye Research. 48(10). 930–938. 1 indexed citations
14.
Wendelstein, Jascha, Marina Casazza, Kamran M. Riaz, et al.. (2023). Characteristics of surgically induced astigmatism after standardized microincisional cataract surgery with a superior limbal incision. Journal of Cataract & Refractive Surgery. 49(10). 1025–1035. 3 indexed citations
15.
Orlando, José Ignacio, et al.. (2022). Postoperative vault prediction for phakic implantable collamer lens surgery: LASSO formulas. Journal of Cataract & Refractive Surgery. 49(2). 126–132. 18 indexed citations
16.
Klaproth, Oliver K., et al.. (2014). Anterior Surface-Based Keratometry Compared With Scheimpflug Tomography-Based Total Corneal Astigmatism. Investigative Ophthalmology & Visual Science. 56(1). 291–298. 82 indexed citations
17.
Kohnen, Thomas, et al.. (2010). Comparison of monocular and binocular infrared pupillometers under mesopic lighting conditions. Journal of Cataract & Refractive Surgery. 36(4). 625–630. 11 indexed citations
18.
Kohnen, Thomas, David W. Allen, C Boureau, et al.. (2006). European Multicenter Study of the AcrySof ReSTOR Apodized Diffractive Intraocular Lens. Ophthalmology. 113(4). 578–584.e1. 230 indexed citations
19.
Mirshahi, Alireza & Thomas Kohnen. (2002). Wissenschaftliche Auswertung und Qualitätssicherung bei refraktiv-chirurgischen Eingriffen: Bewertung des Computerprogramms Datagraph med®. Der Ophthalmologe. 99(8). 629–635. 2 indexed citations
20.
Kohnen, Thomas. (1987). Zurückweisungen in Diskussionen : die Konzeption einer Sprechhandlungstheorie als Basis einer empirisch orientierten Konversationsanalyse. Kölner Universitäts PublikationsServer (Universität zu Köln). 1 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.

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