Results 71 to 80 of about 26,868 (188)

Photorefractive Keratectomy in Keratoconus [PDF]

Case Reports in Ophthalmology, 2015
<b><i>Purpose:</i></b> To assess the efficacy and safety of topography-guided photorefractive keratectomy (PRK) for keratoconus and to estimate the subsequent risk of progression. <b><i>Methods:</i></b> This is a retrospective follow-up study. Between 1998 and 2013, 28 eyes of 23 patients (age 17-60) with
Deepali Sandeep Tambe, Anders Ivarsen, Jesper Hjortdal   +2 more
openaire   +5 more sources

Mean posterior corneal power and astigmatism in normal versus keratoconic eyes

Journal of Ophthalmic & Vision Research, 2018
Purpose: To compare mean posterior corneal power and astigmatism in normal versus keratoconus affected eyes and determine the optimal cut-off points to maximize sensitivity and specificity in discriminating keratoconus from normal corneas.
Sepehr Feizi, Siamak Delfazayebaher, Mohammad Ali Javadi, Farid Karimian, Vahid Ownagh, Fatemeh Sadeghpour   +5 more
doaj   +1 more source

Resistance of corneal RFUVA-cross-linked collagens and small leucine-rich proteoglycans to degradation by matrix metalloproteinases [PDF]

, 2013
Purpose. Extracellular matrix metalloproteinases (MMPs) are thought to play a crucial role in corneal degradation associated with the pathological progression of keratoconus.
Conrad, Gary W., Littlechild, Stacy Lee, Mao, Xiuli, Schwend, Tyler, Zhang, Yuntao   +4 more
core   +1 more source

Corneal transparency after cross-linking for keratoconus : 1-year follow-up [PDF]

, 2012
PURPOSE: To evaluate the changes in corneal transparency and thickness measured objectively using Pentacam Scheimpfl ug (Oculus Optikgerate GmbH) corneal tomography (densitometry) after corneal cross-linking (CXL).
González-Méijome, José Manuel, Gutiérrez, Ángel Ramón, Lopez, Inma, Villa-Collar, César   +3 more
core   +1 more source

Oxidative Stress in Keratoconus?

Investigative Opthalmology & Visual Science, 2011
The purpose of this study was to establish the alterations of oxidative stress-related markers in keratoconus (KC) corneas.A total of 6 healthy and 11 ectatic corneas (7 KC and 4 post-LASIK) were studied. Different oxidative stress-related markers were determined to assess their implication in the KC pathophysiology.
Arnal, Emma, Peris Martínez, Cristina, Menezo, Jose Luis, Johnsen-Soriano, Siv, Romero, Francisco-Javier   +4 more
openaire   +5 more sources

Propriedades biomecânicas locais em uma córnea modelada usando elementos finitos prevê surgimento de ceratocone [PDF]

, 2009
PURPOSE: The ability to predict and understand which biomechanical properties of the cornea are responsible for the stability or progression of keratoconus may be an important clinical and surgical tool for the eye-care professional.
CARVALHO, Luis Alberto, CHAMON, Wallace, COSTA NETO, Alvaro, CUNHA, Rodivaldo H., PARANHOS JR, Augusto, PRADO, Marcelo, SCHOR, Paulo   +6 more
core   +3 more sources

Clinical performance of a new hybrid contact lens for keratoconus [PDF]

, 2014
Objectives: To compare the clinical performance of the Clearkone hybrid contact lens for the treatment of keratoconus against the habitual contact lens of the patients. Methods: A total of 33 eyes from 18 patients were fitted with the Clearkone. High-
Abdalla, Acar, Apsey, Barnett, Betts, Chung, Edrington, Elliott, Fernandez-Velazquez, Fonn, Fujita, Gonzalez-Meijome, Gonzalez-Meijome, Guirao, Jinabhai, Kubaloglu, Lee, Lembach, Lipson, Lopez-Alemany, Maguen, Mannis, Mantyjarvi, McMahon, Nau, Owens, Ozkurt, Pesudovs, Pesudovs, Pilskalns, Rabinowitz, Reeves, Schirmbeck, Sorbara, Williams, Xie, Zadnik   +36 more
core   +2 more sources

Retinal nerve fibre layer and ganglion cell complex thickness in patients with keratoconus

African Vision and Eye Health, 2018
Background: Keratoconus, a corneal ectasia, is associated with corneal thinning and altered optical media. Consequently, assessment of the visual field, optic nerve head and intraocular pressure measurements may be challenging in patients with ...
Prianka Cuppusamy, Nokwanda Makhanya, Mbekezeli Methula, Kausar M. Essop, Duduzile Sibisi, Naseera Wohabally, Nonkululeko Gcabashe, Nishanee Rampersad   +7 more
doaj   +1 more source

Razões para recusar candidatos à cirurgia refrativa corneana [PDF]

, 2002
Purpose: To present how the section of Refractive Surgery of the Federal University of São Paulo assesses the candidates and the reasons to indicate for corneal refractive surgery. Methods: We examined 1626 patients.
Allemann, Norma, Campos, Mauro Silveira de Queiroz, Chamon, Wallace, Ribeiro, André Luiz Parolin, Schor, Paulo   +4 more
core   +3 more sources

Misdiagnosing Keratoconus [PDF]

Expert Review of Ophthalmology, 2016
Several diagnostic criteria have been defined for the detection of keratoconus and keratoconus suspect. Most of these criteria are based on the analysis of the anterior and posterior corneal topography and the aberrometric pattern. However, there are corneas without ectasia showing an abnormal topographic and aberrometric pattern compatible with ...
openaire   +2 more sources