gms | German Medical Science

21st Annual Meeting of the German Retina Society and 8th Symposium of the International Society of Ocular Trauma (ISOT)

German Retina Society
International Society of Ocular Trauma

19.06. - 22.06.2008, Würzburg

Extraction of an intraretinal magnetizable foreign body

Meeting Abstract

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  • Bernhard M. Stoffelns - Mainz/Germany

Retinologische Gesellschaft. International Society of Ocular Trauma. 21. Jahrestagung der Retinologischen Gesellschaft gemeinsam mit dem 8. Symposium der International Society of Ocular Trauma. Würzburg, 19.-22.06.2008. Düsseldorf: German Medical Science GMS Publishing House; 2008. DocISOTRG2008V097

The electronic version of this article is the complete one and can be found online at:

Published: June 18, 2008

© 2008 Stoffelns.
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: To demonstrate a procedure, how to extract magnetic intraocular foreign bodies in the posterior segment by minimizing the risk for retinal damage and detachment.

Method: The video is introduced by a presentation, how magnetic foreign bodies were removed out of the globe using traditional methods with external and internal magnets. Later on advances in microsurgical vitrectomy techniques with direct visualization of the foreign body during removal rendered it possible to grasp and extract the foreign body with special designed micro-forceps. This video demonstrates the case of a magnetic intraocular foreign body, embedded in the retina after hammering a chisel (metal on metal). In the first step cryotherapy of the impact site was performed to create retinal adhesion.

Result: One week after the injury the foreign body was removed by use of a special designed Reimann-Forceps. This combination of a foreign body forceps with a permanent magnet installed inside, which can move along the central axis, makes it possible to remove a foreign body from the retina with exceptionally low risk. The foreign body does not have to be transferred to a second instrument but can be removed safely through a pars plana sclera tunnel not wider than the fragment.

Conclusion: The combination of a retractable permanent magnet inside a foreign body forceps is a real improvement in the procedure for intraocular removal of magnetizable metal fragments.

Financial interests of the author are disclosed.