Results 21 to 30 of about 4,816 (194)

Comparison of clinical outcomes of Eyecryl toric and Alcon toric intra-ocular lenses – A real world study [PDF]

Indian Journal of Ophthalmology, 2023
Purpose: To compare the visual outcomes and residual astigmatism following implantation of Eyecryl toric versus Alcon AcrySof IQ toric intra-ocular lenses (IOLs).
Nilay Reddy Korpole, Padma Kurada, Neetha I R Kuzhuppilly, Madhukar Reddy Korpole   +3 more
doaj   +2 more sources

Refractive outcomes of toric intra-ocular lens implantation in cases of high posterior corneal astigmatism [PDF]

Indian Journal of Ophthalmology, 2023
Purpose: To evaluate whether the toric intra-ocular lens (IOL) power calculation based on total corneal astigmatism (TCA) in eyes with high posterior corneal astigmatism (PCA) could result in a systematic over-correction or under-correction after ...
Tianru Jin, Lan Yu, Jingjing Li, Yanwen Zhou   +3 more
doaj   +2 more sources

Quantitative analysis of the effect of ocular rotation on postoperative residual astigmatism in small incision lenticule extraction for myopia correction [PDF]

Frontiers in Cell and Developmental Biology
ObjectiveThe aim of this study was to conduct a systematic investigation into the effects of ocular rotation on postoperative residual astigmatism in patients undergoing small incision lenticule extraction (SMILE).MethodsA prospective observational ...
Caiyu Liu, Caiyu Liu, Xiaoying Xu, Xiaoying Xu, Xiaoying Xu, Hao Gu, Hao Gu, Hao Gu, Chi Wang, Chi Wang, Lu Lu, Lu Lu, Kaizhen Ye, Kaizhen Ye, Yan Zheng, Yan Zheng, Haiyan Wang, Wei Chen, Meiyan Li, Xiaolin Zhou, Shangkun Ou, Shangkun Ou, Shangkun Ou, Shangkun Ou, Fangwen Yang, Fangwen Yang   +25 more
doaj   +2 more sources

The Impact of Changes in Corneal Back Surface Astigmatism on the Residual Astigmatic Refractive Error following Routine Uncomplicated Phacoemulsification [PDF]

Journal of Ophthalmology, 2020
Purpose. To determine the significance of any association between intersessional changes in ocular residual astigmatism (RA) and astigmatism at corneal front (FSA) and back (BSA) surfaces following uneventful routine phacoemulsification.
Larysa Tutchenko, Sudi Patel, Oleksiy Voytsekhivskyy, Mykhailo Skovron, Olha Horak   +4 more
doaj   +2 more sources

Ocular residual and corneal astigmatism in a clinical population of high school students.

PLoS ONE, 2018
PurposeTotal refractive astigmatism is usually the first consideration that guides the selection of contact lens type (e.g., spherical or toric), while the ocular source of the astigmatism is a second, but more important consideration, for the final ...
Zhao Chen, Luoru Liu, Chenglin Pan, Xiaoning Li, Lun Pan, Weizhong Lan, Zhikuan Yang   +6 more
doaj   +3 more sources

Post-keratoplasty astigmatism management by relaxing incisions: a systematic review [PDF]

Eye and Vision, 2017
Postoperative visual acuity can be limited by post-keratoplasty astigmatism, even with a clear corneal graft. Astigmatism management can be performed by selective suture removal, adjustment of sutures, optical correction, photorefractive procedures ...
Gaëlle Ho Wang Yin, Louis Hoffart
doaj   +2 more sources

Age-Related Changes in Refractive, Corneal, and Ocular Residual Astigmatism: A Power Vector Analysis

National Board of Examinations Journal of Medical Sciences
Introduction: Astigmatism results from the combined contribution of corneal and internal ocular components. Understanding the relationship between refractive astigmatism (RA), corneal astigmatism (CA), and ocular residual astigmatism (ORA) across ...
Padmanabhan Sundaram, Zakia Sugaina Mohammed, Divya Karupannasamy, Sundaram Devisundaram   +3 more
doaj   +2 more sources

Measurement of ocular component contributions to residual astigmatism in adult human eyes [PDF]

, 1995
The aim of this study was to determine whether an ophthalmophakometric technique could offer a feasible means of investigating ocular component contributions to residual astigmatism in human eyes. Current opinion was gathered on the prevalence, magnitude and source of residual astigmatism.
Elawad, Mohamed E.A.
openaire   +3 more sources

WaveLight® Contoura topography-guided planning: contribution of anterior corneal higher-order aberrations and posterior corneal astigmatism to manifest refractive astigmatism [PDF]

Clinical Ophthalmology, 2018
Avi Wallerstein,1,2 Mathieu Gauvin,1,2 Mark Cohen2,3 1Department of Ophthalmology, Faculty of Medicine, McGill University, Montreal, QC, Canada; 2LASIK MD, Montreal, QC, Canada; 3Department of Surgery, Faculty of Medicine and Health Sciences, University
Wallerstein A, Gauvin M, Cohen M
doaj   +1 more source

Influence of Ocular Residual Astigmatism on the Correction of Myopic Astigmatism by Toric Implantable Collamer Lens: A Comparative Study With Femtosecond Laser Small Incision Lenticule Extraction [PDF]

Frontiers in Medicine, 2022
Yishan Qian, Xingtao Zhou, Ling Sun
exaly   +2 more sources