The effects of Valsalva manoeuvre on Ocular Response Analyzer measurements

The aim was to evaluate the effects of the Valsalva manoeuvre on Ocular Response Analyzer (ORA) measurements. A total of 152 eyes of 76 healthy individuals were included. The biomechanical properties of cornea, including corneal hysteresis (CH), corneal resistance factor (CRF) and intraocular pressu...

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Bibliographic Details
Published in:Clinical and experimental optometry 2015-09, Vol.98 (5), p.447-450
Main Authors: Palamar, Melis, Dag, Medine Yilmaz, Yagci, Ayse
Format: Article
Language:English
Subjects:
Abdominal Cavity - physiology
Adult
cornea
Cornea - physiology
corneal hysteresis
corneal resistance factor
Elasticity
Female
Healthy Volunteers
Humans
intraocular pressure
Intraocular Pressure - physiology
Male
Middle Aged
Ocular Response Analyzer
Pressure
Thoracic Cavity - physiology
Tonometry, Ocular - methods
Valsalva Maneuver - physiology
Valsalva manoeuvre
Young Adult
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Summary:The aim was to evaluate the effects of the Valsalva manoeuvre on Ocular Response Analyzer (ORA) measurements. A total of 152 eyes of 76 healthy individuals were included. The biomechanical properties of cornea, including corneal hysteresis (CH), corneal resistance factor (CRF) and intraocular pressure (IOP) parameters, namely, cornea compensated IOP (IOPcc) and Goldmann correlated IOP (IOPg) as measured with ORA were obtained before and during the Valsalva manoeuvre. Wilcoxon test for group analysis, Mann-Whitney test for intergroup analysis, Generalized Estimating Equation, and Spearman's test for correlation analysis were used. The mean age of the 76 subjects (52 female) was 34.18 ± 10.20 years (range, 21 to 58 years). The mean IOPcc was 14.50 ± 0.30 mmHg before and 19.80 ± 0.60 mmHg during the Valsalva manoeuvre (p 
ISSN:0816-4622
1444-0938
DOI:10.1111/cxo.12303