The role of the vitreous body in effective IOL positioning

  • Joris Vander MijnsbruggeEmail author
  • Jean-Francois Fils
  • Joyce Jansen
  • Minh-Tri Hua
  • Peter Stalmans



To compare the effective lens position (ELP) after phaco surgery alone and after combined phacovitrectomy surgery.


Twenty patients who were scheduled for elective surgery in both eyes were included. In one eye, phacovitrectomy surgery was performed (without any tamponade), and in the fellow eye, only phaco surgery was performed using the same IOL type. Pre- and postoperative biometric measurements were performed using laser interference biometry. The postoperative anterior chamber depth (ACD) was measured to determine the ELP. The primary outcome measure was the difference in the postoperative ACD between both eyes.


The postoperative ACD following phacovitrectomy showed a statistically significant increase compared with that following phaco surgery alone, indicating a more posterior position of the IOL.


An adjusted ELP parameter to optimize IOL calculation may be useful in eyes undergoing combined phacovitrectomy sugergy.


Effective lens position Phacovitrectomy Postoperative anterior chamber depth  IOL power calculation formulas 


Compliance with ethical standards

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

Informed consent was obtained from all individual participants included in the study. The study was registered at the Ethics Committee of the University Hospital Leuven prior to patient inclusion. Registration number ELP20160105. January 2016.

Conflict of interest

Peter Stalmans is a consultant for Bausch + Lomb, DORC, Nano-Retina, Ophtec, Vitreq and Zeiss, received speaker fees from AMO and received a research grant from Thrombogenics.


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Ophthalmology, University Hospitals LeuvenLeuvenBelgium
  2. 2.Ars StatisticaNivellesBelgium

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