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Refractive predictability in eyes with intraocular gas tamponade – results of a prospective controlled clinical trial

Authors Wagenfeld L, Hermsdorf K, Stemplewitz B, Druchkiv V, Frings A

Received 18 January 2017

Accepted for publication 22 March 2017

Published 23 May 2017 Volume 2017:11 Pages 993—998

DOI https://doi.org/10.2147/OPTH.S132644

Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Dr Amy Norman

Peer reviewer comments 2

Editor who approved publication: Dr Scott Fraser

Lars Wagenfeld,1 Kristin Hermsdorf,1 Birthe Stemplewitz,1 Vasyl Druchkiv,1 Andreas Frings2

1Department of Ophthalmology, University Medical Centre Hamburg-Eppendorf (UKE), Hamburg, 2Department of Ophthalmology, University Hospital Düsseldorf, Heinrich-Heine University, Düsseldorf, Germany

Purpose: To determine the postoperative refractive error in eyes with intraocular gas tamponade in combined phacovitrectomy using a Z-haptic intraocular lens (IOL).
Methods: This prospective non-randomized case-control study compared patients with combined phacovitrectomy with or without intraocular gas tamponade to cataract surgery-only. The main outcome measure was the IOL power prediction error (PE). Secondary outcome measures were spherical equivalent, anterior chamber depth (ACD), and axial length.
Results: Thirty-four patients with epiretinal membranes and 18 patients with cataract only were enrolled. There were no statistically significant (P>0.05) differences of IOL power PE or postoperative ACDs (P=0.952–1.00). Nevertheless, IOL power PE indicated a myopic shift in cases with phacovitrectomy independent of gas tamponade (P=1.00). No statistically significant between-group differences between secondary outcome measures were observed.
Conclusion: A myopic shift after phacovitrectomy seems to be independent of the use of intraocular gas tamponade. When using a Z-haptic IOL, aiming for slight residual hyperopia (+0.50 D) is suggested in patients having phacovitrectomy.

Keywords: IOL power prediction error, myopic shift, intraocular gas tamponade, biometry, pars plana vitrectomy, axial length

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