The aim of this study is to investigate the effect two antiglaucoma procedures, namely trabeculectomy and Ex-PRESS mini-shunt insertion on biomechanical properties cornea. This a prospective study. Thirty patients (30 eyes) were included in Nineteen eyes had an shunt inserted (Group 1) 11 2). examination time points for both groups one three weeks preoperatively at month 1, 6, 12 postoperativel...

BACKGROUD To evaluate the symmetry of corneal biomechanical metrics, measured using an ocular response analyzer (ORA) and self-built corneal inflation test platform, in bilateral rabbit corneas and to investigate their relationship with physical intraocular pressure (IOPp). METHODS Twenty fresh enucleated eyes from ten rabbits were used for ex vivo whole ocular globe inflation. IOP was increa...

The aim of this study was to investigate the corneal alterations occurring in rheumatoid arthritis (RA) patients compared with healthy subjects and to define the presence of biomechanical alterations in cornea accompanying dry eye disease, the most common ocular manifestation of RA. Forty-seven RA patients and 40 control cases without any known systemic or ocular diseases were included in this ...

Administration of low doses of Escherichia coli endotoxin [a lipopolysaccharide (LPS)] to humans enables the study of inflammatory mechanisms. The purpose of the present study was to investigate whether the blue-field entoptic technique may be used to quantify the increase in circulating leukocytes in the ocular microvasculature after LPS infusion. In addition, combined laser Doppler velocimetr...

PURPOSE To investigate air puff induced corneal vibrations and their relationship to the intraocular pressure (IOP), viscoelasticity, mass, and elasticity of the cornea based on theoretical simulations and preliminary clinical observations. METHODS To simulate the corneal movement during air puff deformation, a kinematic viscoelastic corneal model was developed involving the factors of cornea...

Introduction In a broad review, evidence that the corneal biomechanical properties influence the results and outcomes of various ocular measurements and procedures has existed for some time [1,2]. However, assessing the biomechanical properties of corneal tissue in vivo has previously not been possible. With the recent introduction of the Reichert Ocular Response Analyzer (ORA), direct clinical...

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...

AIM To describe possible causes of progressive hyperopia in patients who underwent radial keratotomy. MATERIAL AND METHODS The study enrolled 33 subjects who underwent radial keratotomy earlier in their lives, of them 15 controls (29 eyes, group 1) with no refractive error and 18 patients (35 eyes, group II) with progressive hyperopia. The number and type of keratotomy scars was determined du...