Results 161 to 170 of about 176,934 (194)

Corneal hysteresis in patients with corneal pathologies

Acta Ophthalmologica Scandinavica, 2007
Abstract Purpose: To investigate the corneal hysteresis (CH), the corneal resistance factor (CRF) and the corneal compensated intraocular pressure (IOPcc) of subjects with normal corneas and with corneal pathologies with the Ocular Response Analyzer (ORA).
S HERDENER, N PFEIFER, S LAUTEBACH, M PACHE   +3 more
openaire   +1 more source

Dependence of corneal hysteresis on non-central corneal thickness in healthy subjects

Journal Français d'Ophtalmologie, 2023
To evaluate the dependence of corneal hysteresis (CH) on non-central corneal thickness.Cross-sectional study of 1561 eyes of 1561 healthy volunteers with IOP less than 21mmHg, open angles on gonioscopy and no prior eye surgeries or local or systemic diseases.
M. Jiménez-Santos, F. Sáenz-Francés, O. Rodríguez-Quet, I. Cerván-Lopez, E. Santos-Bueso, J.M. Martinez-de-la-Casa, L. Jañez-Escalada   +6 more
openaire   +2 more sources

IOP: Corneal Hysteresis

2009
Corneal hysteresis (CH) is a measurement that reflects the viscoelastic properties of the cornea and its biomechanical integrity. Hysteresis is expressed in units of mmHg, just like intraocular pressure (IOP). Unlike IOP, CH shows no significant variation throughout the day [1]. The Ocular Response Analyzer (ORA) (Reichert Corp.
Lionel A. Marzette, Leon W. Herndon
openaire   +1 more source

Changes in Corneal Hysteresis After Clear Corneal Cataract Surgery

American Journal of Ophthalmology, 2007
To assess the changes in corneal hysteresis (CH) as measured by the Ocular Response Analyzer (ORA; Reichert Ophthalmic Instruments, Buffalo, New York, USA) to describe the influence of clear corneal cataract surgery on corneal viscoelastic properties and intraocular pressure (IOP) measured by noncontact tonometry (NCT) and Goldmann applanation ...
Annette, Hager, Kristina, Loge, Marc-Oliver, Füllhas, Bernd, Schroeder, Martin, Grossherr, Wolfgang, Wiegand   +5 more
openaire   +2 more sources

Corneal Hysteresis and Beta-Zone Parapapillary Atrophy

American Journal of Ophthalmology, 2012
To evaluate the relationship between β-zone parapapillary atrophy (βPPA) and corneal hysteresis (CH) in patients with glaucoma.Prospective, cross-sectional study.Glaucoma patients aged 18 to 90 years with disc photographs within 12 months of the study visit were consecutively enrolled. Exclusion criteria included ocular surgery other than clear corneal
Daniel D, Hayes, Christopher C, Teng, Carlos Gustavo, de Moraes, Celso, Tello, Jeffrey M, Liebmann, Robert, Ritch   +5 more
openaire   +2 more sources

Evaluation of corneal hysteresis and corneal resistance factor after corneal cross-linking for keratoconus

Graefe's Archive for Clinical and Experimental Ophthalmology, 2011
To evaluate corneal hysteresis (CH) and corneal resistance factor (CRF) in keratoconic (KC) eyes before and after corneal collagen cross-linking (CXL). Furthermore, to determine potential correlations with a series of corneal and demographic factors.The study consisted of 50 KC eyes that underwent CXL.
Maria, Gkika, Georgios, Labiris, Athanassios, Giarmoukakis, Anna, Koutsogianni, Vassilios, Kozobolis   +4 more
openaire   +2 more sources

Correlations between corneal hysteresis, intraocular pressure, and corneal central pachymetry

Journal of Cataract and Refractive Surgery, 2008
To analyze the correlation between corneal hysteresis (CH) measured with the Ocular Response Analyzer (ORA, Reichert) and ultrasonic corneal central thickness (CCT US) and intraocular pressure measured with Goldmann applanation tonometry (IOP GA).Bordeaux 2 University, Ophthalmology Department, Bordeaux, France.This study comprised 498 eyes of 258 ...
David, Touboul, Cynthia, Roberts, Julien, Kérautret, Caroline, Garra, Sylvie, Maurice-Tison, Elodie, Saubusse, Joseph, Colin   +6 more
openaire   +2 more sources

Corneal biomechanics study : relationship between corneal aberration – hysteresis

Acta Ophthalmologica, 2009
Abstract Purpose To determinate the relatioship between corneal aberration and a biomechanical parameter: the corneal hysteresis. Methods 122 eyes of 61 patients were included in a prospective and transversal study. Range of age was between 18 and 60 years.
D PEREZ GARCIA, J IBANEZ, Z VALYI, P CASAS, JA CRISTOBAL   +4 more
openaire   +1 more source

Corneal Hysteresis as a Marker for Patients with Secondary Glaucoma

Seminars in Ophthalmology
To investigate and compare the association of corneal hysteresis (CH) in patients with secondary glaucoma to control patients and patients with primary open-angle glaucoma (POAG). Additionally, to determine the consistency of CH measurements in patients with secondary glaucoma.A total of 84 patients (121 eyes) were prospectively included in this study.
Marko, Oydanich, Aditya, Uppuluri, Hadeel, Sadek, Albert S, Khouri   +3 more
openaire   +2 more sources

Factors associated with corneal hysteresis

2019
The purpose of the present thesis was to provide values of corneal hysteresis (CH) in a Greek, healthy population and to investigate its association with demographic, ocular, and systemic factors. Out of 1092 subjects from the incidence cohort of the Thessaloniki Eye Study (TES) that were invited to be re-evaluated between 2013 and 2015, there were 801
openaire   +1 more source