نتایج جستجو برای: corneal biomechanics

تعداد نتایج: 36340  

2017
Yoshitake Kato Shunsuke Nakakura Ryo Asaoka Kanae Matsuya Yuki Fujio Yoshiaki Kiuchi

PURPOSE Modern cataract surgery is generally considered to bring about modest and sustained intraocular pressure (IOP) reduction. However, the pathophysiological mechanism for this remains unclear. Moreover, a change in ocular biomechanical properties after surgery can affect the measurement of IOP. The aim of the study is to investigate ocular biomechanics, before and following cataract surger...

2014
María A Del Buey Laura Lavilla Francisco J Ascaso Elena Lanchares Valentín Huerva José A Cristóbal

Purpose. To examine biomechanical parameters of the cornea in myopic eyes and their relationship with the degree of myopia in a western healthy population. Methods. Corneal hysteresis (CH), corneal resistance factor (CRF), Goldmann correlated intraocular pressure (IOP), and corneal compensated IOP (IOPcc) were measured using the ocular response analyzer (ORA) in 312 eyes of 177 Spanish subjects...

Journal: :Advanced Optical Technologies 2021

Abstract The cornea is a part of the anterior segment eye that plays an essential optical role in refracting light rays on retina. Cornea also preserves shape eyeball and constitutes mechanical barrier, protecting against factors external environment. structure influences its biomechanical properties ensures appropriate load transfer (that depends environment intraocular pressure) while maintai...

Journal: :Bioengineering 2023

Assessing corneal biomechanics in vivo has long been a challenge the field of ophthalmology. Despite recent advances optical coherence tomography (OCT)-based elastography (OCE) methods, controversy remains regarding effect intraocular pressure (IOP) on mechanical wave propagation speed cornea. This could be attributed to complexity and difficulties associated with conducting shear-wave OCE meas...

اسلامی, فاطمه, قاسمی بصیر, حمیدرضا,

Introduction & Objective: Corneal ulcer is one of the most important medical emergencies that in the absence of on time diagnosis and treatment can lead to loss of vision. Therefore, identification of microorganisms and their response to drugs in each region is important. The aim of this study was to determine the most common organisms that cause keratitis and antibiotic sensitivity in this reg...

Esmaeil Tamadonfard, Firooz Hamzeh goshchi Nasrin Hamzeh gooshchi

In the present study, the effects of the acute and chronic oral administrations (po) of curcumin in the absence and presence of morphine and naloxone was investigated on the sensation of acute corneal pain in rats. Acute corneal pain was induced by the local application of hypertonic saline (5 M NaCl) on the corneal surface, and the number of eye wipes was then counted for 30 s. Subcutaneous (s...

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