gms | German Medical Science

22nd Annual Meeting of the German Retina Society

German Retina Society

26.06. - 27.06.2009, Berlin

Indirect binocular Ophthalmoscope according to Foerster modified with LED

Meeting Abstract

  • Martin A. Leitritz - University Eye Clinic of Tuebingen
  • F. Ziemssen - University Eye Clinic of Tuebingen
  • I. Neuhann - University Eye Clinic of Tuebingen
  • K. U. Bartz-Schmidt - University Eye Clinic of Tuebingen

German Retina Society. 22nd Annual Meeting of the German Retina Society. Berlin, 26.-27.06.2009. Düsseldorf: German Medical Science GMS Publishing House; 2009. DocRG2009-41

doi: 10.3205/09rg42, urn:nbn:de:0183-09rg427

This is the translated version of the article.
The original version can be found at:

Published: June 29, 2009

© 2009 Leitritz et al.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( You are free: to Share – to copy, distribute and transmit the work, provided the original author and source are credited.



Background: Since many years Foerster's ophthalmoscope (FO) is a popular instrument foremost for intraoperative funduscopy. Modifications regarding to new methods of illumination or other sources of energy were not realized. In our experiment we want to demonstrate a modified FO with LED as light source and a alkaline battery.

Methods: The lamp-frame of a native FO was changed to get the possibility to mount a LED. Furthermore an alkaline battery was installed. A pushbutton is used for dim-control.

Results: We could show, that FO can be operated with LED sources. Due to brightness of the light funduscopy can be done in not well shaded conditions. If there is no need for full brightness of the light, an electronical pushbutton can be used for dim-control.

Conclusion: The modified FO promises better handling with good brightness and low costs.