Spectral analysis of intraocular pressure pulse wave in open angle glaucomas and healthy eyes.

Abstract:

PURPOSE:To investigate the spectral content of intraocular pressure (IOP) pulse wave by advanced spectral signal processing of continuous IOP readings obtained by dynamic contour tonometry. PATIENTS AND METHODS:A non-interventional case-control study included 20 healthy subjects, 20 previously untreated primary open angle glaucoma patients, and 20 previously untreated normal tension glaucoma patients. The continuous IOP reading obtained by dynamic contour tonometry was submitted to Fast Fourier Transform signal analysis and further statistical data processing. RESULTS:The spectral components of the IOP pulse wave were discerned up to the fifth harmonic. Highly statistically significant difference was found between the control group and the primary open angle group, and between the primary open angle glaucoma group and the normal tension glaucoma group in the first, second and the third harmonic amplitude (p < 0.01). Glaucoma patients had significantly higher ocular pulse volume values. CONCLUSIONS:It is possible to determine spectral components of the IOP pulse wave up to the fifth harmonic by a spectral analysis of dynamic contour tonometry continuous readings. We found that high Ocular Pulse Amplitude values in primary open angle glaucoma group was associated with high harmonics amplitude, which indicates low rigidity of blood vessels.

journal_name

Curr Eye Res

journal_title

Current eye research

authors

Božić M,Dukić ML,Stojković M

doi

10.3109/02713683.2012.700755

subject

Has Abstract

pub_date

2012-11-01 00:00:00

pages

1019-24

issue

11

eissn

0271-3683

issn

1460-2202

journal_volume

37

pub_type

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