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.

Date Published: 9 March 2012
PDF: 7 pages
Proc. SPIE 8209, Ophthalmic Technologies XXII, 82090R (9 March 2012); doi: 10.1117/12.908848

Published in SPIE Proceedings Vol. 8209:
Ophthalmic Technologies XXII
Fabrice Manns; Per G. Söderberg; Arthur Ho, Editor(s)