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H. Schwarzer, Y. Djalali-Talab, A. K. Vehr, B. Mazinani, N. Plange, P. Walter, G. Roessler; Intraocular Lens Power Calculation Using Partial Coherence Laser Interferometry in Eyes With Silicone Oil Endotemponade. Invest. Ophthalmol. Vis. Sci. 2010;51(13):5748.
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© ARVO (1962-2015); The Authors (2016-present)
To assess the predictability of refractive outcome in eyes with conventional (SO) or heavy silicone oil (HSO) as endotamponade undergoing combined oil removal and cataract surgery while using partial coherence laser interferometry (PCI) for optical biometry.
We included 20 eyes with silicone oil endotamponade (SO n=10, HSO n=10) and cataract where combined oil removal and cataract surgery including IOL implantation was performed. For biometry we used a Zeiss IOLMaster (Carl Zeiss Meditec, Germany) utilizing Haigis formula for the determination of IOL power and the predicted refractive spherical equivalent (SE) which was compared to the actual refractive outcome at least six weeks after surgery. Additionally axial length measurements were repeated at this visit.
Mean axial length was 24.64 ± 1.64 mm before and 24.64 ± 1.64 after oil removal with a mean intraindividual deviation of 0.07 ± 0.08 mm (SO 0.07 ± 0.11, HSO 0.07 ± 0.04 mm). The mean predicted SE at baseline was -0.98 ± 0.98 D compared to the refractive outcome of -1.23 ± 1.1 D as the mean intraindividual deviation was 0.63 ± 0.55 D (SO 0.66 ± 0.50 D, HSO 0.60 ± 0.58 D).
In our analysis optical biometry using PCI generates satisfying results in regard to the postoperative refractive outcome following combined oil removal and cataract surgery. However, in the future this parameter should be investigated on larger patient groups to confirm these results.
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