Goldmann Applanation Tonometry versus Dynamic Contour Tonometry after Vitrectomy with Silicone Oil Endotamponade.

Authors:
Matthias Fuest
Matthias Fuest
RWTH Aachen University
Germany
Dr. Nikolaos Mamas, MD, PhD, FEBOphth
Dr. Nikolaos Mamas, MD, PhD, FEBOphth
Moorfields Eye Hospital
Medical Retina Fellow
London | United Kingdom
Peter Walter
Peter Walter
RWTH Aachen University
Germany
Babac E Mazinani
Babac E Mazinani
RWTH Aachen University
Germany
Gemot Roessler
Gemot Roessler
RWTH Aachen University
Aachen | Germany
Niklas Plange
Niklas Plange
RWTH Aachen University
Germany

Curr Eye Res 2017 07 25;42(7):1007-1012. Epub 2017 Jan 25.

a Department of Ophthalmology , RWTH Aachen University , Aachen , Germany.

Purpose: To evaluate the agreement of intraocular pressure (IOP) measurements using dynamic contour tonometry (DCT) and Goldmann applanation tonometry (GAT) in eyes after vitrectomy with silicone oil endotamponade and controls.

Methods: In this prospective comparative study, IOP was measured with GAT and DCT in 30 eyes with oil endotamponade 1-3 days after vitrectomy and 40 untreated controls. In addition, ocular pulse amplitude (OPA), corneal pachymetry (CCT), and axial length (AL) were measured.

Results: GAT values in the oil group were significantly higher compared to control eyes (mean GAT oil 13.6 ± 5.1 mmHg; mean GAT control 10.8 ± 2.1 mmHg; p = 0.003). There was no significant difference in DCT measurements (mean DCT oil 12.0 ± 4.1 mmHg; mean DCT control 11.9 ± 2.9 mmHg; p = 0.9). This led to a significant difference of GAT-DCT between the oil and control group (mean difference of GAT-DCT oil 1.6 ± 4.7 mmHg; mean difference of GAT-DCT control -1.1 ± 2.6 mmHg; p = 0.004). The difference between GAT and DCT was negatively correlated with the mean IOP measured by both methods (r = -0.36, p = 0.02) and positively correlated with CCT only in the control group (r = 0.36, p = 0.02), as well as to AL only in the oil group (r = 0.46, p = 0.01). The OPA did not differ significantly between groups.

Conclusion: GAT and DCT showed a good agreement in control eyes. The difference of GAT and DCT is significantly changed in eyes after vitrectomy with silicone oil endotamponade. Our findings suggest that GAT overestimates IOP in this situation.

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http://dx.doi.org/10.1080/02713683.2016.1264608DOI Listing

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July 2017
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