Results 161 to 170 of about 2,543 (189)

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

Relationship between optic disc hemorrhage and corneal hysteresis

Canadian Journal of Ophthalmology, 2020
To determine the relationship between optic disc hemorrhage (DH) and corneal hysteresis (CH).Consecutive patients with prior or current photographic evidence of unilateral DH who had undergone CH measurement with the Ocular Response Analyzer (ORA; Reichert, Buffalo, NY) were enrolled.
Nathan M, Radcliffe, Nathaniel, Tracer, Carlos Gustavo V, De Moraes, Celso, Tello, Jeffrey M, Liebmann, Robert, Ritch   +5 more
openaire   +2 more sources

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

Corneal resistance factor and corneal hysteresis in a 6- to 18-year-old population

Journal of Cataract and Refractive Surgery, 2014
To determine the distribution and normal range of the corneal resistance factor (CRF) and corneal hysteresis (CH) in the 6- to 18-year age range and their relationship with biometric components.Dezful, Iran.Cross-sectional study.This study of Dezful school children used a multistage, stratified, cluster approach sampling.
Hassan, Hashemi, Ebrahim, Jafarzadehpur, Shiva, Mehravaran, Abbasali, Yekta, Hadi, Ostadimoghaddam, Reza, Norouzirad, Mehdi, Khabazkhoob   +6 more
openaire   +2 more sources

Corneal Hysteresis, Resistance Factor, Topography, and Pachymetry After Corneal Lamellar Flap

Journal of Refractive Surgery, 2007
Purpose: To measure prospectively the early changes in corneal hysteresis, topography, and pachymetry after the creation of a stromal flap cut without laser photoablation. Methods: A 37-year-old man was referred for a bioptic procedure
Damien, Gatinel, Slim, Chaabouni, Pierre-Alexandre, Adam, Jacques, Munck, Michel, Puech, Thanh, Hoang-Xuan   +5 more
openaire   +2 more sources

Corneal Hysteresis Is Reduced in Obstructive Sleep Apnea Syndrome

Optometry and Vision Science, 2017
SIGNIFICANCE To our knowledge, this is the first time a study looking at the association between corneal hysteresis (CH) and obstructive sleep apnea syndrome (OSAS) severity has been reported. We provide evidence that CH is lower in OSAS and speculate on the possible causes.
Suchitra, Nadarajah, Amir, Samsudin, Norlina, Ramli, Chong Tin, Tan, Zahari, Mimiwati   +4 more
openaire   +2 more sources