Corneal Hysteresis
<p>Corneal Hysteresis as a Biomarker of Glaucoma: Current Insights</p>
... central corneal thickness (CCT), and larger horizontal and vertical cup-disc ...particularly corneal hysteresis (CH) (Table 1). Corneal biomechanics provide insight on how the cornea behaves ...
10
Corneal hysteresis in patients with glaucoma-like optic discs, ocular hypertension and glaucoma
... of corneal biomechanical properties and ...of corneal hysteresis, and the hy- pothesis that increased viscoelasticity of ocular tissues may be protective against glaucomatous nerve ...
8
Assessment of corneal hysteresis measured by the ocular response analyzer as a screening tool in patients with glaucoma
... and because corneal hysteresis (CH) declines with age. The Reichert ocular response analyzer (ORA) (Ametek Reichert Technologies, Depew, NY, USA) measures CH and has been associated with progressive visual ...
5
The role of corneal hysteresis during the evaluation of patients with possible normal-tension glaucoma
... CH, corneal hysteresis; CCT, central cornea thickness; c/d, cup/disc ratio; CV RF, cardiovascular risk factor; DM, diabetes mellitus; iOP, intraocular pressure; iOPc, compensated iOP reading with Ora; iOPg, ...
5
Comparison of Goldmann and Pascal tonometry in relation to corneal hysteresis and central corneal thickness in nonglaucomatous eyes
... All these data imply that the effect of corneal parameters on the determination of IOP by both GAT and DCT is complex. Regardless of how differences between DCT and GAT could be explained, their clinical relevance ...
7
In vivo assessment of changes in corneal hysteresis and lamina cribrosa position during acute intraocular pressure elevation in eyes with markedly asymmetrical glaucoma
... the corneal surface, while an air jet is delivered by the ...the corneal contribution to IOP measurement than CCT ...of corneal resistance, which is rela- tively independent of ...
12
Relationship between corneal biomechanical properties and structural biomarkers in patients with normal-tension glaucoma: a retrospective study
... Central corneal thickness; CH: Corneal hysteresis; CI: Confidence interval; CRF: Corneal resistant factor; D: Diopter; ECM: Extra cellular matix; EMGT: Early manifest glaucoma trial; GAT: ...
10
Femtosecond laser-assisted astigmatic keratotomy: a review
... The corneal biomechanics evaluated included corneal hysteresis (CH), which reflects the cor- neal damping ability, and corneal resistance factor (CRF), which indicates the overall ...
11
Corneal biomechanical parameters and intraocular pressure: the effect of topical anesthesia
... elasticity, and CH is a measure of the viscoelastic parameters of the cornea. Both parameters are measured with the ocular response analyzer (ORA), which fires a precisely metered air pulse that indents the cornea into ...
8
The effect of flap thickness on corneal biomechanics after myopic laser in situ keratomileusis using the M-2 microkeratome
... The corneal hysteresis (CH) and corneal resistance factor (CRF) were measured preoperatively and 3 months after surgery, using the Ocular Response Analyzer ® ...
7
<p>Improved Efficacy of Topical Latanoprost 0.005% Demonstrated by Corneal Biomechanical Correcting Modified Goldmann Prism</p>
... Purpose: To evaluate intraocular pressure (IOP) reduction measured by a Goldmann appla- nation tonometer (GAT) prism and a modified surface Goldmann (CATS) prism with the institution of a topical prostaglandin analog ...
9
Corneal densitometry in high myopia
... in corneal-related parameters in HM eyes, such as corneal curvature, corneal thickness, and endothelial density, are still under debate [4 – ...that corneal hysteresis was significantly ...
6
Associations of biomechanical properties of the cornea with environmental and metabolic factors in an elderly population : the ALIENOR study
... measurements. Corneal hysteresis (CH) and corneal resistance factor (CRF) are both viscoelastic parameters of the cornea obtained with the ...machine. Corneal hysteresis is defined as ...
9
The effect of prostaglandin analogs on the biomechanical properties and central thickness of the cornea of patients with open-angle glaucoma: a 3-year study on 108 eyes
... with prostaglandin analogs (PGAs) is the treatment of choice for millions of patients. For the past few years, the clinical gold standard for measuring IOP was Goldmann applanation tonometry (GAT). Recent studies have ...
8
Goldmann and error correcting tonometry prisms compared to intracameral pressure
... central corneal thickness (CCT measurement (Zeiss HD-OCT, Jena, Germany), corneal topography (Zeiss Atlas model 9000 Jena, Germany), di- lated funduscopy and an Ocular Response Analyzer (ORA) with ...
9
Role of corneal biomechanical properties in predicting of speed of myopic progression in children wearing orthokeratology lenses or single-vision spectacles
... in corneal hysteresis (CH), corneal resistance factor (CRF) and several parameters derived from the wave- form ...the corneal tissue to dissipate energy, and CRF refers to an indicator of the ...
7
Ocular Response Analyzer to Assess Age Related Biomechanical Characteristics of the Cornea in a Taiwanese Population
... properties. Hysteresis is a parameter to describe the bio- mechanical properties of the cornea ...the corneal biomechanical properties until the use of Reichart ocular response analyzer (ORA) ...Both ...
8
On the Damped Beams with Hysteresis
... This paper discusses the hysteretic behavior of beams with external elements made from auxetic materials. The damping force is modeled by using the nonlocal theory. Unlike the local models, the damping force is modeled ...
9
Multiferroic Hysteresis Loop
... multiferroic hysteresis loop is compared to P(E) loops detected in static external magnetic fields.. Figure 4a shows the results of the hysteresis loop measurements of figure 3 in a P[r] ...
9
On the KdV Equation with Hysteresis
... the hysteresis operators in connection with ...with hysteresis is just an example of a more general method developed by Visintin ...with hysteresis is re- duced to a system of differential inclusions ...
5