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Accuracy and Reproducibilty of Axial Length Measurement in Eyes with Silicone Oil Endotemponade
  1. Gernot F Roessler1,
  2. Julia K Huth1,
  3. Thomas S Dietlein2,
  4. Sven Dinslage2,
  5. Niklas Plange1,
  6. Peter Walter1 and
  7. Babac A E Mazinani1
  1. 1 RWTH Aachen Technical University, Germany;
  2. 2 University of Cologne, Germany
  1. * Corresponding author; email: gf.roessler{at}


Purpose: To assess the accuracy and signal quality of axial length measurements by partial coherence laser interferometry (PCI) for optical biometry in eyes with conventional (SO) or heavy silicone oil (HSO) as endotamponade.

Methods: We included 26 eyes with silicone oil endotamponade (SO n=15, HSO n=11) using a Zeiss IOLMaster (Carl Zeiss Meditec, Germany) for measurement of axial length the day before and at least six weeks after silicone oil removal. We analyzed the intraindividual deviation between both measurements and signal-to-noise-ratio (SNR) as parameter for signal quality. As control group we included 16 contralateral eyes without history of vitreoretinal surgery.

Results: Mean axial length was 24.76 ± 2.07 mm (SO 24.63 ± 2.12 mm, HSO 24.93 ± 2.10 mm, control 24.95 ± 2.61 mm) before and 24.75 ± 1.96 after oil removal with a mean intraindividual deviation of 0.13 ± 0.11 mm (SO 0.13 ± 0.12, HSO 0.13 ± 0.09 mm, control 0.02 ± 0.01) while SNR at baseline was 5.7 ± 3.5 (SO 6.6 ± 4.0, HSO 4.4 ± 2.2, control 8.6 ± 3.9).

Conclusions: In our analysis optical biometry using PCI generates satisfying results of accuracy and signal quality of axial length measurement in silicone oil-filled eyes.

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