Swept source OCT with air puff chamber for corneal dynamics measurements

Karnowski, Karol, Alonso-Caneiro, David, Kałużny, Bartłomiej, Kowalczyk, Andrzej , & Wojtkowski, Maciej (2012) Swept source OCT with air puff chamber for corneal dynamics measurements. In Manns, Fabrice, Söderberg, Per G., & Ho, Arthur (Eds.) Ophthalmic Technologies XXII [Progress in Biomedical Optics and Imaging - Proceedings of SPIE], SPIE Press, The Moscone Center, San Francisco, CA, 82090R-1.

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Abstract

None of currently used tonometers produce estimated IOP values that are free of errors. Measurement incredibility arises from indirect measurement of corneal deformation and the fact that pressure calculations are based on population averaged parameters of anterior segment. Reliable IOP values are crucial for understanding and monitoring of number of eye pathologies e.g. glaucoma. We have combined high speed swept source OCT with air-puff chamber. System provides direct measurement of deformation of cornea and anterior surface of the lens. This paper describes in details the performance of air-puff ssOCT instrument. We present different approaches of data presentation and analysis. Changes in deformation amplitude appears to be good indicator of IOP changes. However, it seems that in order to provide accurate intraocular pressure values an additional information on corneal biomechanics is necessary. We believe that such information could be extracted from data provided by air-puff ssOCT.

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ID Code: 58068
Item Type: Conference Paper
Refereed: Yes
Keywords: Optical coherence tomography, Fourier domain detection methods, Swept source OCT, Anterior segment of the eye, Cornea topographic analyses
DOI: 10.1117/12.908848
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > BIOMEDICAL ENGINEERING (090300) > Biomedical Instrumentation (090303)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > BIOMEDICAL ENGINEERING (090300) > Medical Devices (090304)
Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300) > Optical Technology (111302)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Current > Schools > School of Optometry & Vision Science
Copyright Owner: Copyright 2012 SPIE Press
Deposited On: 12 Mar 2013 23:04
Last Modified: 18 Mar 2013 15:17

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