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Thomas Olsen, MD

Full name             Thomas Køllner Olsen

Title(s)                   MD, Prof., dr. med.

Date of birth       April 4th 1952

Contact information

Work Address: Aros Privathospital, Skejbyparken 154, Aarhus N, Denmark DK-8200

Private Address: Holtevej 24, Aarhus C, Denmark DK-8000


Academic degrees

MD. (University of Aarhus, Denmark) - 1978

Dr. med. (Equivalent to PhD) (University of Aarhus, Denmark) - 1982

Associated Professor (University of Aarhus, Denmark) - 1991

(In Denmark ‘Professor’ is the highest academic degree and a title reserved for a person who has been found qualified by the University)

Clinical posts

Senior Consultant and Head of the out-patient cataract service center at University Eye Clinic, Aarhus Hospital, Denmark: 1991 – 2017

Consultant, Aros Privathospital, Skejby, Denmark: 2000 – present

Consultant, Memira Refractive Surgery: 2015 – 2020

Copenhagen Eye Center: 2014 – 2021

Medical Society Affiliations

Scandinavian Society of Cataract and Refractive Surgery (SSCRS)

President: 2006 – present

ESCRS (European Society of Cataract and Refractive Surgeons)

Board Member: 2006 – 2013

ESCRS member: 1992 – present

ASCRS member: 1992 – present

Medical director, Danish National Cataract Outcome Registry: 1999 – 2004

IOL Power Club (

(Founder Secretary 2005, Past-President, President 2021-23): 2005 – present

Scientific Interests

Thomas Olsen began his scientific career before his residency as a research fellow at the University Eye Clinic 1979 – 1982. He earned his title ‘dr. med.’ in 1982 based on the work ‘Specular microscopic investigations on the corneal endothelium and its involvement in corneal edema. For several years he was working in the field of cornea research as part of the research team at the University Eye Clinic. His research shifted gradually into more optical aspects of clinical examination of the cornea and the retina. He designed new methods to measure the thickness of the cornea and to measure the reflection of the corneal reflex, The latter work was awarded as The International 1. prize Winner of "Chibret International Award 1984". From 1986 his interest focused on physiological optics and methods to improve IOL power calculation. This led to the area of biometry and this has been his main interest ever since. He developed a thick-lens IOL power calculation in 1987 and soon realized the need of improving the ELP prediction, which has been the subject of several publications.

He is the author of the Olsen formula, which has been implemented on several biometers and is downloadable from as a stand-alone PC IOL power calculation and data management application. He has published over 145 journal articles since 1978.

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