نتایج جستجو برای: corneal permeability

تعداد نتایج: 78316  

دامن پاک, وحید, دوستدار, عسگر, قاسمی, محمد صادق, نصیری, نادر,

  Background : Posterior corneal elevation changes are keys to early diagnosis of corneal ectasia after keratorefractive surgery, so it is important to use an accurate method for measuring posterior corneal elevation. The purpose of this study is investigating posterior corneal elevation changes with Pentacam(HR) on patients underwent photorefractive keratectomy.   Methods: In this clinical tri...

Journal: :Investigative ophthalmology & visual science 2014
Langis Michaud

Scleral contact lens technology had been applied for several years as part of the treatment of ocular surface diseases, as well as for compensation of corneal surface irregularities. In recent years, new scleral lens designs were developed to compensate for current refractive errors. Becoming more widely used, it is crucial to question the long-term effects of their presence on ocular health. O...

Objective(s): Micelles have been studied as nanoparticulate drug delivery systems for improving the topical ocular delivery of hydrophobic drugs. The objective of this study was to develop and characterize dexamethasone-loaded polycaprolactone-polyethylene glycol-polycaprolactone (PCL-PEG-PCL) micelles to improve patient compliance and enhance the ocular bioavailability of poorly water-soluble ...

Journal: :Investigative ophthalmology & visual science 1977
D L Van Horn H F Edelhauser G Prodanovich R Eiferman H F Pederson

Widespread use of the mercurial-containing preservative thimerosal as an antibacterial agent in ophthalmic drugs and solutions warranted an investigation into its possible cytotoxic effects on the functional and ultrastructural integrity of the corneal endothelium. No changes in corneal thickness were observed during 5 hours' perfusion of the endothelium of rabbit and human corneas with 0.0001 ...

Journal: :Investigative ophthalmology & visual science 2010
Zhuo Chen Zhijie Li Surendra Basti William J Farley Stephen C Pflugfelder

PURPOSE Protein kinase C (PKC) α plays a major role in the parasympathetic neural stimulation of lacrimal gland (LG) secretion. It also has been reported to have antiapoptotic properties and to promote cell survival. Therefore, the hypothesis for the present study was that PKCα knockout ((-/-)) mice have impaired ocular surface-lacrimal gland signaling, rendering them susceptible to desiccating...

Journal: :Archives of ophthalmology 2003
José A P Gomes Myrna S Santos Angela S Ventura Waleska B C Donato Marcelo C Cunha Ana Luísa Höfling-Lima

OBJECTIVE To report the use of preserved amniotic membrane and living related corneal limbal/conjunctival transplantation in total limbal stem cell and conjunctival deficiency secondary to severe Stevens-Johnson syndrome. DESIGN Prospective, noncomparative, interventional case series. PATIENTS AND METHODS Ten eyes of 10 patients with total limbal stem cell and conjunctival deficiency second...

2008
R Valls E Vega M.L Garcia M.A Egea J.O Valls

This work is focused on the ex vivo study of corneal permeation of two anti-inflammatory drugs: diclofenac, and flurbiprofen (as a model of hydrophilic and lipophilic drug, respectively) loaded to cyclodextrins or polymeric nanoparticles in order to determine differences in their corneal permeation against free drug or commercial eye drops. These studies were carried out in a corneal device des...

Journal: :Journal of bacteriology 1966
J O Oh E J Gill

Oh, J. O. (University of British Columbia, Vancouver, B.C., Canada), and E. J. Gill. Role of interferon-like viral inhibitor in endotoxin-induced corneal resistance to Newcastle disease virus. J. Bacteriol. 91:251-256. 1966.-A state of marked resistance to the toxic corneal effects of Newcastle disease virus (NDV) was observed in rabbit eyes after intravenous injection of 10 or 100 mug of typho...

A SHarifi S Ahmadi

Background & Aims: This study was carried out to determine the leading indications for corneal transplantation in Kerman province. Methods: Medical records of 186 patients underwent corneal transplantation during 3 years (2004-2006) in Shafa Medical Center were evaluated retrospectively. The initial diagnosis and causes of corneal grafting were recorded. Infectious keratitis (Bacterial, Fungal,...

Journal: :Investigative ophthalmology & visual science 2000
J A Peterson B Tian J W McLaren W C Hubbard B Geiger P L Kaufman

PURPOSE To determine the effects of latrunculin (LAT)-A or -B on intraocular pressure (IOP), aqueous humor flow (AHF), anterior chamber (AC) protein concentration ([protein]AC), corneal endothelial permeability and morphology, and corneal thickness in living cynomolgus monkeys. METHODS Topical LAT-A or LAT-B was administered to one eye, and vehicle to the other. IOP was measured by Goldmann t...

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