Results 171 to 180 of about 4,816 (194)
Excimer laser programming of refractive astigmatism vs. anterior corneal astigmatism in the case of ocular residual astigmatism (ORA) [PDF]
Journal Francais D'Ophtalmologie, 2021 To determine whether manifest refractive astigmatism (RA) or anterior corneal astigmatism (CA) is the best value for excimer laser programming in cases of ocular residual astigmatism (ORA).Patients who had undergone LASIK surgery with a disagreement between manifest refractive and corneal cylinder (ocular residual astigmatism ORA)>0.75 D were included ...
Liem Trinh +2 more
exaly +4 more sources
Evaluating internal and ocular residual astigmatism in Chinese myopic children [PDF]
Japanese Journal of Ophthalmology, 2017 To investigate the nature of internal astigmatism (IA) and ocular residual astigmatism (ORA) in Chinese myopic children and to identify factors that may influence IA and ORA.A total of 206 eyes of 206 myopic children (97 boys and 109 girls; 10.95 ± 2.2 years) were enrolled in this cross sectional study.
Mingwei Zhao, Lu Zhang, Yue Zhang
exaly +4 more sources
Clinical utility of ocular residual astigmatism and topographic disparity vector indexes in subclinical and clinical keratoconus [PDF]
Graefe's Archive for Clinical and Experimental Ophthalmology, 2015 We aimed to characterize the distribution of the vector parameters ocular residual astigmatism (ORA) and topography disparity (TD) in a sample of clinical and subclinical keratoconus eyes, and to evaluate their diagnostic value to discriminate between these conditions and healthy corneas.This study comprised a total of 43 keratoconic eyes (27 patients,
David P Piñero +2 more
exaly +4 more sources
Refractive, corneal and ocular residual astigmatism: distribution in a German population and age-dependency - the Gutenberg health study [PDF]
Graefe's Archive for Clinical and Experimental Ophthalmology, 2017 Worldwide, the most frequent cause of visual impairment is uncorrected refractive error. This analysis focused on the distribution and associations of refractive, corneal and ocular residual astigmatism.As part of the Gutenberg Health study, a population-based cross-sectional study was conducted in the general population of Germany.
Thomas Muenzel +2 more
exaly +8 more sources
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Predicting Ocular Residual Astigmatism Using Corneal and Refractive Parameters: A Myopic Eye Study
Current Eye Research, 2013To investigate the nature of ocular residual astigmatism (ORA) in myopic patients and to identify indicators to predict a patient's ORA from corneal and ocular refractive data.In total, 356 myopic eyes from 178 patients (M:F = 41:137) were examined using a Scheimpflug keratometer (Pentacam) and a wavefront analyzer (WaveScan).
Choul Yong Park +2 more
exaly +3 more sources
International Ophthalmology, 2016
This study was initiated to introduce the term non-corneal ocular residual astigmatism (N-CORA) as a new parameter in astigmatic change analysis after implantation of two different types of non-toric, multifocal intraocular lenses (MIOL).Seventy-two eyes from 72 consecutive patients after MIOL surgery were studied in terms of a retrospective, cross ...
Andreas Frings +2 more
exaly +3 more sources
This study was initiated to introduce the term non-corneal ocular residual astigmatism (N-CORA) as a new parameter in astigmatic change analysis after implantation of two different types of non-toric, multifocal intraocular lenses (MIOL).Seventy-two eyes from 72 consecutive patients after MIOL surgery were studied in terms of a retrospective, cross ...
Andreas Frings +2 more
exaly +3 more sources
Ocular residual astigmatism (ORA) in pre-cataract eyes prior to and after refractive lens exchange
International Ophthalmology, 2016The purpose of this study was to analyze ocular residual astigmatism (ORA) before and after implantation of two different optical types of non-toric multifocal intraocular lenses (MIOL) in pre-cataract patients. This retrospective cohort study analyzed 72 eyes from 72 consecutive patients after MIOL surgery .
Andreas Frings +2 more
exaly +3 more sources
Journal of Cataract and Refractive Surgery, 2014
To analyze the influence of demographic and ocular factors on ocular residual astigmatism (ORA) in myopic laser in situ keratomileusis (LASIK).University Medical Center Hamburg-Eppendorf, Hamburg, Germany.Retrospective cross-sectional data analysis.Eyes of consecutive myopic patients scheduled for LASIK were studied to evaluate the influence on ...
Andreas, Frings +5 more
openaire +2 more sources
To analyze the influence of demographic and ocular factors on ocular residual astigmatism (ORA) in myopic laser in situ keratomileusis (LASIK).University Medical Center Hamburg-Eppendorf, Hamburg, Germany.Retrospective cross-sectional data analysis.Eyes of consecutive myopic patients scheduled for LASIK were studied to evaluate the influence on ...
Andreas, Frings +5 more
openaire +2 more sources
Ophthalmic and Physiological Optics, 2005
Abstract Purpose: The purpose of this study is to assess the impact of decentration of astigmatic intra‐ocular lenses on the residual refraction after cataract surgery, using a computing scheme with 5 × 5 system matrices. Methods:
Achim, Langenbucher +2 more
openaire +2 more sources
Abstract Purpose: The purpose of this study is to assess the impact of decentration of astigmatic intra‐ocular lenses on the residual refraction after cataract surgery, using a computing scheme with 5 × 5 system matrices. Methods:
Achim, Langenbucher +2 more
openaire +2 more sources
Journal of Refractive Surgery
Purpose: To identify the factors that contribute to the arithmetic difference between refractive astigmatism (RA) and anterior corneal astigmatism (ACA), particularly the potential roles of ocular residual astigmatism (ORA), posterior corneal astigmatism (PCA), and anterior corneal irregularities (ACI).
Yan Zhang +11 more
openaire +1 more source
Purpose: To identify the factors that contribute to the arithmetic difference between refractive astigmatism (RA) and anterior corneal astigmatism (ACA), particularly the potential roles of ocular residual astigmatism (ORA), posterior corneal astigmatism (PCA), and anterior corneal irregularities (ACI).
Yan Zhang +11 more
openaire +1 more source