Results 41 to 50 of about 7,180 (270)

Changes in intraocular pressure and ocular pulse amplitude with accommodation [PDF]

British Journal of Ophthalmology, 2009
To investigate the change that occurs in intraocular pressure (IOP) and ocular pulse amplitude (OPA) with accommodation in young adult myopes and emmetropes.Fifteen progressing myopic and 17 emmetropic young adult subjects had their IOP and OPA measured using the Pascal dynamic contour tonometer.
Read, Scott, Collins, Michael, Becker, Heidi, Cutting, Jeremy, Ross, Danielle, Savill-Inns, Annyck, Trevor, Bethwyn   +6 more
openaire   +3 more sources

Non-invasive Clinical Measurement of Ocular Rigidity and Comparison to Biomechanical and Morphological Parameters in Glaucomatous and Healthy Subjects

Frontiers in Medicine, 2021
Purpose: To assess ocular rigidity using dynamic optical coherence tomography (OCT) videos in glaucomatous and healthy subjects, and to evaluate how ocular rigidity correlates with biomechanical and morphological characteristics of the human eye.Methods:
Yanhui Ma, Sayoko E. Moroi, Cynthia J. Roberts, Cynthia J. Roberts   +3 more
doaj   +1 more source

Ocular pressure waveform reflects ventricular bigeminy and aortic insufficiency

Indian Journal of Ophthalmology, 2015
Ocular pulse amplitude (OPA) is defined as the difference between maximum and minimum intraocular pressure (IOP) during a cardiac cycle. Average values of OPA range from 1 to 4 mmHg.
Jean B Kassem, Steven E Katz, Ashraf M Mahmoud, Robert H Small, Subha V Raman, Cynthia J Roberts   +5 more
doaj   +1 more source

Eye-hand synergy and intermittent behaviors during target-directed tracking with visual and non-visual information. [PDF]

PLoS ONE, 2012
Visual feedback and non-visual information play different roles in tracking of an external target. This study explored the respective roles of the visual and non-visual information in eleven healthy volunteers who coupled the manual cursor to a ...
Chien-Ting Huang, Ing-Shiou Hwang
doaj   +1 more source

Relationship between ocular pulse amplitude and systemic blood pressure measurements [PDF]

Acta Ophthalmologica, 2009
Abstract.Purpose:  This study aimed to determine whether ocular pulse amplitude (OPA) measured with dynamic contour tonometry (DCT) is related to systemic blood pressure (BP) parameters.Methods:  Blood pressure was measured continuously and simultaneously with OPA in one randomly selected eye in 29 healthy subjects. Systemic parameters of interest were:
Grieshaber, Matthias C., Katamay, Robert, Gugleta, Konstantin, Kochkorov, Asan, Flammer, Josef, Orgül, Selim   +5 more
openaire   +2 more sources

The Effect of the Water Drinking Test on Ocular Parameters and Choroidal Thickness in Glaucoma Suspects

Medicina, 2023
Background and objectives: We aimed to evaluate the effects of the water drinking test (WDT) on several systemic and ocular parameters, including choroidal thickness, which was assessed through optical coherence tomography angiography (OCTA), in glaucoma
Stylianos A Kandarakis, Andreas Katsimpris, Persefoni Kourti, Filippos Psinakis, Efthymios Karmiris, Evangelia Papakonstantinou, Konstantinos Andreanos, Petros Petrou, Ilias Georgalas   +8 more
doaj   +1 more source

Anestesia peribulbar com ropivacaína: estudo da ação vasoconstritora Anestesia peribulbar con ropivacaína: estudio de la acción vasoconstrictora Ropivacaine in peribulbar anesthesia: vasoconstrictive properties

Revista Brasileira de Anestesiologia, 2010
JUSTIFICATIVA E OBJETIVOS: A anestesia peribulbar pode reduzir o fluxo sanguíneo ocular (FSO) por elevação da pressão intraocular (PIO) ou ação de fármacos.
Catia Sousa Govêia, Edno Magalhãe
doaj   +1 more source

Ocular Rigidity, Ocular Pulse Amplitude, and Pulsatile Ocular Blood Flow: The Effect of Intraocular Pressure

Investigative Opthalmology & Visual Science, 2009
The purpose of this study was to characterize the pressure-volume relation in the living human eye, measure the ocular pulse amplitude (OPA), and calculate the corresponding pulsatile ocular blood flow (POBF) in a range of clinically relevant IOP levels.Fifty patients with cataract (50 eyes) were enrolled in the study. After cannulation of the anterior
Anna I, Dastiridou, Harilaos S, Ginis, Dirk, De Brouwere, Miltiadis K, Tsilimbaris, Ioannis G, Pallikaris   +4 more
openaire   +2 more sources

Ocular Rigidity, Ocular Pulse Amplitude, and Pulsatile Ocular Blood Flow: The Effect of Axial Length

Investigative Opthalmology & Visual Science, 2013
Previous studies have shown a negative correlation between axial length (AL) and pulsatile ocular blood flow (POBF). This relation has been questioned because of the possible confounding effect of ocular volume on ocular rigidity (OR). The purpose of this study was to investigate the relation between AL, as a surrogate parameter for ocular volume, and ...
Anna I, Dastiridou, Harilaos, Ginis, Miltiadis, Tsilimbaris, Nikos, Karyotakis, Efstathios, Detorakis, Charalambos, Siganos, Pierros, Cholevas, Evangelia E, Tsironi, Ioannis G, Pallikaris   +8 more
openaire   +2 more sources

The impact of central corneal thickness on values of intraocular pressure measured using two methods: Goldmann applanation and dynamic contour tonometry in patients with open-angle glaucoma [PDF]

Halo 194, 2020
Introduction Dynamic contour tonometry (DCT) is a contact, non-applanation method for measuring intraocular pressure (IOP). Objektive The study aimed at evaluating the impact of central corneal thickness (CCT) on values of IOP measured using two methods:
Jordanova Elena, Hentova-Senćanić Paraskeva, Marjanović Ivan, Senćanić Ivan, Stefanović Ivana, Baralić Marko   +5 more
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