May 2008
Volume 49, Issue 13
Free
ARVO Annual Meeting Abstract  |   May 2008
Influence of Biometric Values on the Optic Nerve Head Planimetry Using HRT and OCT
Author Affiliations & Notes
  • M. K. Klamann
    Department of Ophthalmology, University of Magdeburg, Magdeburg, Germany
  • A. Viestenz
    Department of Ophthalmology, University of Magdeburg, Magdeburg, Germany
  • C. K. Vorwerk
    Department of Ophthalmology, University of Magdeburg, Magdeburg, Germany
  • A. Langenbucher
    Institute of Medical Physics, University of Erlangen-Nuremberg, Germany, Erlangen-Nuremberg, Germany
  • W. Behrens-Baumann
    Department of Ophthalmology, University of Magdeburg, Magdeburg, Germany
  • Footnotes
    Commercial Relationships  M.K. Klamann, None; A. Viestenz, None; C.K. Vorwerk, None; A. Langenbucher, None; W. Behrens-Baumann, None.
  • Footnotes
    Support  None.
Investigative Ophthalmology & Visual Science May 2008, Vol.49, 3642. doi:https://doi.org/
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      M. K. Klamann, A. Viestenz, C. K. Vorwerk, A. Langenbucher, W. Behrens-Baumann; Influence of Biometric Values on the Optic Nerve Head Planimetry Using HRT and OCT. Invest. Ophthalmol. Vis. Sci. 2008;49(13):3642. doi: https://doi.org/.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Purpose: : To evaluate the optic nerve head (ONH) planimetry with two different methods, and to investigate the influence of optic/biometric parameters.

Methods: : Prospective examination of 106 eyes with OCT Stratus and HRT II. After a complete ophthalmologic examination fundus photographs were taken and mean central corneal power (CCP Zeiss IOLMaster), central corneal thickness (CCT, Tomey AL-1000, SD < 5µm), anterior chamber depth (ACD), axial length (AL, Zeiss IOLMaster), and spherical equivalent (SEQ) were measured. The difference between OCT and HRT values was correlated with the biometric data.

Results: : The size of the ONH did not differ significantly (p=0.78) between OCT and HRT II measurements (OCT=2.28+/-0.58 mm², HRT II=2.27+/-0.54 mm², r=0.686 p<0.001). The excavation values of the ONH differed significantly (p<0.001; OCT=1.29+/-0.76 mm², HRT II=0.97+/-0.57 mm², r=0.604 p<0.001). A good correlation of the CCT, CCP, AL, ACD and SEQ was found with the difference of ONH size (OCT-HRT, r=0.593; p<0.001, ANOVA) and ONH excavation (OCT -HRT, r=0.359; p=0.009, ANOVA).

Conclusions: : Optic magnification has a significant impact on the papillary planimetry. A correct magnification formula should be applied in the future to offer comparable measurements with different diagnostic glaucoma devices.

Keywords: imaging methods (CT, FA, ICG, MRI, OCT, RTA, SLO, ultrasound) • imaging/image analysis: clinical 
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