Results 51 to 60 of about 6,238 (208)

Distribution of corneal densitometry in different grades of keratoconus

Indian Journal of Ophthalmology, 2023
Purpose: To evaluate the use of Scheimpflug tomography in corneal densitometry (CD) in comparing the stages of keratoconic eyes. Methods: Keratoconic (KC) corneas (stages 1–3 classified according to the topographic parameters) were examined using the ...
Amr Mounir, Islam Awny, Hassan S Yousef, Engy M Mostafa   +3 more
doaj   +1 more source

Influence of Pachymetry and Intraocular Pressure on Dynamic Corneal Response Parameters in Healthy Patients [PDF]

, 2016
To evaluate the influence of pachymetry, age, and intraocular pressure in normal patients and to provide normative values for all dynamic corneal response parameters (DCRs) provided by dynamic Scheimpflug ...
Ahmed Elsheikh, Ali, Ambrósio, Ambrósio, Andreassen, Bak-Nielsen, Bao, Bernardo T. Lopes, Carvalho, Claudio Azzolini, Coste, Cynthia J. Roberts, Davey, David Sung Yong Kang, Daxecker, Dupps, Dupps, Elsheikh, Elsheikh, Elsheikh, Elsheikh, Elsheikh, Elsheikh, Emanuela Morenghi, Fern, Frings, Frings, Hallahan, Hassan, Huseynova, Joda, Kling, Knox Cartwright, Lee, Liu, Luce, Manny, Mikielewicz, Nomura, Paolo Vinciguerra, Pedersen, Pinero, Regensburg, Renato Ambrósio, Riccardo Vinciguerra, Roberts, Roberts, Roberts, Rochtchina, Salvetat, Shen, Shen, Tian, Tian, Tian, Wilson, Wong, Ye   +57 more
core   +1 more source

Corneal biomechanical response following collagen cross-linking with Rose Bengal-green light and riboflavin-UVA [PDF]

, 2017
10 págs.; 9 figs. ; Open Access funded by Creative Commons Atribution Licence 4.0To compare the biomechanical corneal response of two different corneal cross-linking (CXL) treatments, rose bengal¿green light (RGX) and riboflavin-UVA (UVX), using ...
Bekesi, Nandor, Kochevar, Irene E., Marcos, Susana   +2 more
core   +1 more source

Geometric model of image formation in Scheimpflug cameras [PDF]

, 2016
We present a geometric model of image formation in Scheimpflug cameras that is most general. Scheimpflug imaging is commonly used is scientific and medical imaging either to increase the depth of field of the imager or to focus on tilted object surfaces. Existing Scheimpflug imaging models do not take into account the effect of pupil magnification (i.e.
Sinharoy, Indranil, Rangarajan, Prasanna, Christensen, Marc P.   +2 more
openaire   +1 more source

Comparative analysis of peripheral corneal geometry in health and Keratoconus [PDF]

, 2017
OBJECTIVES:: To describe and compare corneal peripheral angles in normal and keratoconic eyes, to gain a better understanding of the topography of the periphery of the cornea in keratoconus and assist practitioners in the selection and fitting of large ...
Cardona Torradeflot, Genís, Gispets Parcerisas, Joan, Lupón Bas, Núria, Mas Aixalà, Enric   +3 more
core   +2 more sources

A Comprehensive Evaluation of the Precision (Repeatability and Reproducibility) of the Oculus Pentacam HR [PDF]

, 2011
This article is made available with the permission of the publisher, Association for Research in Vision and OphthalmologyPurpose.: To evaluate the precision (repeatability and reproducibility) of the Pentacam HR (high-resolution) tomographer (Oculus ...
Khadka, Jyoti, McAlinden, Colm, Pesudovs, Konrad   +2 more
core   +1 more source

Astigmatic changes after Descemet membrane endothelial keratoplasty (DMEK) in decompensated penetrating keratoplasty grafts

Acta Ophthalmologica, EarlyView.
Abstract Purpose To evaluate the surgery‐induced changes of astigmatism after Descemet membrane endothelial keratoplasty (DMEK) in eyes with failed previous penetrating keratoplasty (PK). Design Retrospective, interventional cohort study based on prospective DMEK database.
Florian Thomas Steinberg, Jithmi Weliwitage, Marie von Berg, Silvia Schrittenlocher, Simona Schlereth, Claus Cursiefen, Björn Bachmann   +6 more
wiley   +1 more source

Diagnosis of keratoconus with optical coherence tomography

Journal of the Egyptian Ophthalmological Society, 2016
Purpose The aim of the study was to assess the accuracy of optical coherence tomography (OCT) (3D OCT-2000) in diagnosing keratoconus by measuring the central corneal thickness and the central curvature radius.
Mortada A Abozaid, Ashraf M Mohammed
doaj   +1 more source

Repeatability of keratometry depending on tear film osmolarity

Acta Ophthalmologica, EarlyView.
Abstract Purpose To determine the repeatability of keratometry and astigmatism measurements of patients depending on the tear film osmolarity using three different devices. Methods In this study, 97 eyes of 97 patients with a mean age of 64.92 ± 12.07 years received three repeated measurements with the IOLMaster 700 (Carl Zeiss Meditec, Jena, Germany),
David Schneider, Klemens Paul Kaiser, Petra Davidova, Thomas Kohnen, Tyll Jandewerth   +4 more
wiley   +1 more source

Corneal Densitometry with Galilei Dual Scheimpflug Analyzer

Photonics, 2023
This study aims to apply the densitometry distribution analysis (DDA) method to study corneal densitometry depending on age and corneal region from Galilei Dual Scheimpflug Analyzer tomography. A total of 83 healthy participants aged 39.02 ± 18.34 years (
Alejandra Consejo, Silvia Basabilbaso, Laura Remon   +2 more
doaj   +1 more source