Comparison of ocular biomechanical response parameters in myopic and hyperopic eyes using dynamic bidirectional applanation analysis

Roberts, Cynthia J.; Reinstein, Dan Z.; Archer, Timothy J; Mahmoud, Ashraf M.; Gobbé, Marine; Lee, Linden

doi:10.1016/j.jcrs.2014.04.011

Cited by 21 publications

(14 citation statements)

References 21 publications

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“…On the other hand, in WEM-t short-group, IOPcc and mean GAT-IOP were included (AICc = 39.23) instead of CH (AICc = 40.18). This is probably because IOPcc is closely associated with CH 35 , 36 , but also associated with IOP level at the time of measurement (Asaoka R, et al . IOVS.…”

Section: Discussionmentioning

confidence: 99%

The effect of air pulse-driven whole eye motion on the association between corneal hysteresis and glaucomatous visual field progression

Aoki

Murata

Fujino

et al. 2018

Sci Rep

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Corneal hysteresis (CH) measured with Ocular Response Analyzer (Reichert: ORA) has been reported to be closely related to the glaucomatous visual field (VF) progression. The air pulse applied to an eye not only induces corneal deformation, but also whole eye motion (WEM), which may result in an inaccurate measurement of CH. Here we investigated the influence of air pulse-driven WEM measured with the Corivs ST (CST®, OCULUS) on the relationship between CH and VF progression in primary open angle-glaucoma patients. Using the CST parameters of the maximal WEM displacement (WEM-d) and the time to reach that displacement (WEM-t), the eyes were classified into subgroups (WEM-d low- and high-group, and WEM-t short- and long-group). For the whole population and all subgroups, the optimal linear mixed model to describe mean of total deviation (mTD) progression rate with eight reliable VFs was selected from all combinations of seven parameters including CH. As a result, optimal models for the mTD progression rate included CH in the whole population, the WEM-d low- group and the WEM-t short-group, but not in the WEM-d high-group and the WEM-t long-group. Our findings indicated association between CH and glaucomatous progression can be weakened because of large WEM.

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Section: Discussionmentioning

confidence: 99%

The effect of air pulse-driven whole eye motion on the association between corneal hysteresis and glaucomatous visual field progression

Aoki

Murata

Fujino

et al. 2018

Sci Rep

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“…This may be because the magnitude of elevation of IOP when an eye is deformed in response to air pulse application may be related to the visco-elasticity of the cornea and sclera, considering IOPcc is designed to compensate for corneal properties[ 35 ] and is highly correlated with CH. [ 51 , 52 ] bIOP, not only adjusted for CCT and age, but also for cornea curvature at HC (personal communication with Oculus) may represent some aspects of corneal visco-elasticity, though the HCE measurement calculated using bIOP was not significantly related to mTD progression rate.…”

Section: Discussionmentioning

confidence: 99%

Correlation between elastic energy stored in an eye and visual field progression in glaucoma

Aoki

Murata

Nakakura³

et al. 2018

PLoS ONE

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PurposeTo investigate whether the elastic energy stored in an eyeball at highest concavity (highest concavity energy; HCE), calculated with Corivs ST (CST, OCULUS), correlates with glaucomatous visual field (VF) progression.Methods108 eyes from 70 primary open angle-glaucoma patients were studied. The HCE was calculated using CST parameters. For each eye, the mean total deviation (mTD) of the 52 test points in the 24–2 Humphrey Field Analyzer test pattern was calculated and the mTD progression rate was determined from eight reliable VFs. Eyes were subdivided into: subgroups with low- or high-whole eye motion maximal length (WEM-d) and subgroups with short- or long-time taken to reach WEM-d (WEM-t), as measured with CST. The associations between mTD progression rate and HCE and other ocular/systemic parameters including age, Goldmann applanation tonometry based-intraocular pressure [GAT-IOP], and corneal hysteresis [CH] from the Ocular Response Analyzer (ORA®, Reichert) were investigated using the linear mixed model. The optimal model to describe mTD progression rate was selected from all possible combinations according to the second order bias corrected Akaike Information Criterion index.ResultsOptimal models to describe mTD progression rate included: CH in the model for all eyes, age and HCE in the model for the WEM-d low group, HCE in the model for the WEM-t short group, mean GAT-IOP in the model for the WEM-d high group, and age in the model for the WEM-t long-group.ConclusionsHCE was associated with glaucomatous VF progression in eyes with minimal whole eye motion (low WEM-d and WEM-t subgroups).

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“…33 The Ocular Response Analyzer (Reichert, Inc., Depew, New York, NY, USA) uses an airjet to measure corneal hysteresis to monitor disease progression by direct measurement of in vivo corneal stiffness. 34 Measurements of corneal hysteresis can be dependent on corneal hydration, thickness, and intraocular pressure, 35,36 thereby limiting the utility of the device in some patients. A new technique described by Vinciguerra and colleagues 37 using the Corvis ST (Oculus Optikgeräte GmbH, Wetzlar, Germany) was shown to be accurate in identifying keratoconic eyes from normal eyes through a new biomechanical measure called the Corvis Biomechanical Index.…”

Section: Discussionmentioning

confidence: 99%

Loss of Tryptophan Fluorescence Correlates With Mechanical Stiffness Following Photo-Crosslinking Treatment of Rabbit Cornea

Williams

Lewis

Franco

2017

Invest. Ophthalmol. Vis. Sci.

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Comparison of ocular biomechanical response parameters in myopic and hyperopic eyes using dynamic bidirectional applanation analysis

Abstract: Proprietary or commercial disclosures are listed after the references.

Cited by 21 publications

References 21 publications

The effect of air pulse-driven whole eye motion on the association between corneal hysteresis and glaucomatous visual field progression

The effect of air pulse-driven whole eye motion on the association between corneal hysteresis and glaucomatous visual field progression

Correlation between elastic energy stored in an eye and visual field progression in glaucoma

Loss of Tryptophan Fluorescence Correlates With Mechanical Stiffness Following Photo-Crosslinking Treatment of Rabbit Cornea

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