Results 31 to 40 of about 7,180 (270)

Corneal pulsation and biomechanics during induced ocular pulse. An ex-vivo pilot study.

PLoS ONE, 2020
The purpose of this study was to ascertain the relationships between the amplitude of the corneal pulse (CP) signal and the parameters of corneal biomechanics during ex-vivo intraocular pressure (IOP) elevation experiments on porcine eyes with ...
Maja M Rogala, Daniel Lewandowski, Jerzy Detyna, Agnieszka Antończyk, Monika E Danielewska   +4 more
doaj   +1 more source

Relationship of Ocular Pulse Amplitude with Eye Structures and Systemic Blood Pressure

Türk Oftalmoloji Dergisi, 2011
Pur po se: To assess the relationship of ocular pulse amplitude with eye structures and systemic blood pressure in healthy subjects. Ma te ri al and Met hod: Fifty-one healthy subjects were included in the study.
Ebru Nevin Çetin, Kemal Yayla, Avni Murat Avunduk, Volkan Yaylalı, Cem Yıldırım   +4 more
doaj   +1 more source

Review on Dynamic Contour Tonometry and Ocular Pulse Amplitude [PDF]

Ophthalmic Research, 2015
Intraocular pressure (IOP) measurement is the cornerstone of the management of glaucoma patients. The gold standard for assessing IOP is Goldmann applanation tonometry (GAT). Recently, the dynamic contour tonometer (DCT) has become available. While both devices provide reliable IOP measurements, the results are not interchangeable.
Koen, Willekens, Rita, Rocha, Karel, Van Keer, Evelien, Vandewalle, Luís, Abegão Pinto, Ingeborg, Stalmans, Carlos, Marques-Neves   +6 more
openaire   +2 more sources

Trabecular Meshwork Motion Profile from Pulsatile Pressure Transients: A New Platform to Simulate Transitory Responses in Humans and Nonhuman Primates

Applied Sciences, 2021
Trabecular meshwork (TM) motion abnormality is the leading cause of glaucoma. With technique limitations, how TM moves is still an enigma. This study describes a new laboratory platform to investigate TM motion responses to ocular transients in ex vivo ...
Chen Xin, Xiaofei Wang, Ningli Wang, Ruikang Wang, Murray Johnstone   +4 more
doaj   +1 more source

High-frequency ultrasound detects biomechanical weakening in keratoconus with lower stiffness at higher grade.

PLoS ONE, 2022
In vivo biomechanical characterization of the cornea remains a challenge. We have developed a high-frequency ultrasound elastography method, the ocular pulse elastography (OPE), to measure corneal axial displacement (CAD) induced by the ocular pulse ...
Sunny Kwok, Xueliang Pan, William Liu, Andrew Hendershot, Jun Liu   +4 more
doaj   +1 more source

Ocular Pulse Amplitude in Behçet Disease

Ocular Immunology and Inflammation, 2011
Behcet disease (BD) is an idiopathic systemic inflammatory vasculitis characterized by recurrent oral aphthous ulcers, genital ulcers, ocular and skin findings, as well as vascular, neurological, a...
Çetin, Ebru Nevin, Bulgu, Yunus, Taşlı, Levent, Çobankara, Veli, Yıldırım, Cem   +4 more
openaire   +7 more sources

Correlation Between Ocular Pulse Amplitude And Arterial Pulse Pressure In Glaucoma, Ocular Hypertension , And Normal Individuals

, 2012
B. P. Figueiredo, Fábio Nishimura Kanadani, N. V. Lima, Sebastião Cronemberger, Syril Dorairaj   +4 more
openalex   +2 more sources

The Effect of Trabeculectomy on Ocular Pulse Amplitude

Investigative Opthalmology & Visual Science, 2010
To investigate whether trabeculectomy, besides its intraocular pressure (IOP)-lowering effect, has an effect on ocular pulse amplitude (OPA); and to determine whether OPA changes are influenced by IOP changes.Forty-eight patients with glaucoma (48 eyes) scheduled for unilateral first-time trabeculectomy were prospectively enrolled from October 2007 to ...
Breusegem, Christophe, Fieuws, Steffen, Zeyen, Thierry, Stalmans, Ingeborg   +3 more
openaire   +3 more sources

Quantification of arterial, venous, and cerebrospinal fluid flow dynamics by magnetic resonance imaging under simulated micro-gravity conditions: a prospective cohort study

Fluids and Barriers of the CNS, 2021
Background Astronauts undergoing long-duration spaceflight are exposed to numerous health risks, including Spaceflight-Associated Neuro-Ocular Syndrome (SANS), a spectrum of ophthalmic changes that can result in permanent loss of visual acuity.
Arslan M. Zahid, Bryn Martin, Stephanie Collins, John N. Oshinski, C. Ross Ethier   +4 more
doaj   +1 more source

Effect of adding clonidine to lidocaine on ocular hemodynamics during sub-Tenon’s anesthesia: randomized double-blind study

Brazilian Journal of Anesthesiology, 2021
Introduction and objectives: Different regional anesthesia techniques for ophthalmology can have hemodynamic effects on the eye. We assessed the effects of adding clonidine to lidocaine on Intraocular Pressure (IOP), Ocular Pulse Amplitude (OPA), and ...
Sigmar Aurea Cabral, Antonio Roberto Carraretto, Angela Maria Sousa, Renato Santiago Gomez   +3 more
doaj   +1 more source