Results 41 to 50 of about 93,210 (330)

Effect of femtosecond laser-assisted steepest-meridian clear corneal incisions on preexisting corneal regular astigmatism at the time of cataract surgery [PDF]

International Journal of Ophthalmology, 2020
AIM: To investigate the clinical efficacy and safety of femtosecond laser-assisted steepest-meridian clear corneal incisions for correcting preexisting corneal astigmatism performed at the time of cataract surgery.
Wei Chen, Min Ji, Jian Wu, Yong Wang, Jing Zhou, Rong-Rong Zhu, Hong Lu, Huai-Jin Guan   +7 more
doaj   +1 more source

Changes in astigmatism after horizontal muscle recession strabismus surgery: A retrospective cohort study

Indian Journal of Ophthalmology, 2021
Purpose: The aim of this study was to evaluate the changes in astigmatism after unilateral recession of horizontal rectus muscles in pediatric patients.
Christina Karakosta, Konstantinos I Bougioukas, Martha Karra, Georgios Kontopanos, Georgios Methenitis, Maria Liaskou, Konstantinos Paraskevopoulos, Anna Kokolaki   +7 more
doaj   +1 more source

Effect of Corneal Incision Features on Corneal Endothelial Cell, Astigmatism, and Higher-Order Aberrations After Implantable Collamer Lens Implantation. [PDF]

J Ophthalmol
Purpose This study evaluated the impact of clear corneal incision (CCI) morphology on corneal endothelial cell density (ECD), astigmatism, and higher‐order aberrations (HOAs) following implantable collamer lens (ICL) implantation. Design Prospective study. Methods Sixty‐five patients (65 eyes) undergoing ICL implantation were included.
Lin IC, Cheng M, Li M, Jiang Y, Xu G, Lei Y, Mao Z, Ning R, Chen X, Wang X.   +9 more
europepmc   +2 more sources

Screen Exposure during Early Life and the Increased Risk of Astigmatism among Preschool Children: Findings from Longhua Child Cohort Study

International Journal of Environmental Research and Public Health, 2020
Screen media usage has become increasingly prevalent in daily life with children being exposed to screens at an early age. This is a growing public health concern with evidence linking screen exposure to detrimental health outcomes, whereas relationship ...
Lihua Huang, Gui-You Yang, K. Schmid, Jing-Yi Chen, Chen-Guang Li, G. He, Zengliang Ruan, Wei-Qing Chen   +7 more
semanticscholar   +1 more source

Comparing surgically induced astigmatism calculated by means of simulated keratometry versus total corneal refractive power [PDF]

, 2018
Purpose: To evaluate surgically induced astigmatism as computed by means of either simulated keratometry (KSIM) or total corneal refractive power (TCRP) after temporal incisions.
Calvo Sanz, Jorge A., Carmona González, David, Fernández, Joaquín, Garzón Jiménez, Nuria, Palomino Bautista, Carlos, Poyales Galán, Francisco, Rodríguez Vallejo, Manuel, Zato Gómez de Liaño, Miguel Á   +7 more
core   +2 more sources

Lyot-based Low Order Wavefront Sensor: Implementation on the Subaru Coronagraphic Extreme Adaptive Optics System and its Laboratory Performance

, 2014
High throughput, low inner working angle (IWA) phase masks coronagraphs are essential to directly image and characterize (via spectroscopy) earth-like planets.
Baudoz, Pierre, Guyon, Olivier, Jovanovic, Nemanja, Kudo, Tomoyuki, Kuhn, Jonas G, Martinache, Frantz, Serabyn, Eugene, Singh, Garima   +7 more
core   +2 more sources

Contribution of Posterior Corneal Astigmatism to Total Corneal Astigmatism in a Sample of Egyptian Population

Clinical Ophthalmology, 2020
Mohamed Hosny, Alaa Badawy, Lobna Khazbak, Mohamed Anis, Sarah Azzam Ophthalmology, Cairo University, Giza, EgyptCorrespondence: Mohamed HosnyOphthalmology, Cairo University, 84 Shehab Street, Mohandeseen, Giza 12411, EgyptTel +20 1000007675Email ...
Hosny M, Badawy A, Khazbak L, Anis M, Azzam S   +4 more
doaj  

Corneal Elevation, Power, and Astigmatism to Assess Toric Orthokeratology Lenses in Moderate-to-High Astigmats.

Eye & contact lens, 2020
OBJECTIVES Fitting philosophies for toric orthokeratology are based on elevation or corneal astigmatism, but it is unclear which is more effective.
Erin S Tomiyama, Anna-Kaye M Logan, K. Richdale   +2 more
semanticscholar   +1 more source

Astigmatism correction and quality optimization of computer-generated holograms for holographic waveguide displays.

Optics Express, 2020
In this manuscript, the astigmatism of the waveguide combiner with a pair of symmetry HOEs was analyzed. The light field can be predicted by the modified convolution formulation of Fresnel diffraction when the information of light passes through the ...
W. Lin, O. Matoba, Bor-Shyh Lin, Wei-Chia Su   +3 more
semanticscholar   +1 more source

Lessons Learned: Quality Analysis of Optical Coherence Tomography in Neuromyelitis Optica

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Introduction Optical coherence tomography (OCT)‐derived retina measurements are markers for neuroaxonal visual pathway status. High‐quality OCT scans are essential for reliable measurements, but their acquisition is particularly challenging in eyes with severe visual impairment, as often observed in neuromyelitis optica spectrum disorders ...
Hadi Salih, Sara Samadzadeh, Charlotte Bereuter, Seyedamirhosein Motamedi, Claudia Chien, Pablo Villoslada, Hadas Stiebel‐Kalish, Nasrin Asgari, Yang Mao‐Draayer, Marius Ringelstein, Joachim Havla, Marco Aurélio Lana Peixoto, Ho Jin Kim, Jacqueline Palace, Maria Isabel Leite, Srilakshmi M. Sharma, Fereshteh Ashtari, Rahele Kafieh, Lekha Pandit, Orhan Aktas, Philipp Albrecht, Letizia Leocani, Itay Lotan, Sasitorn Siritho, Jérôme de Seze, Romain Marignier, Caroline Froment Tilikete, Denis Bernardi Bichuetti, Ivan Maynart Tavares, Ayse Altintas, Anu Jacob, Saif Huda, Ibis Soto de Castillo, Lawrence J. Cook, Michael R. Yeaman, Axel Petzold, Alexander U. Brandt, Friedemann Paul, Frederike C. Oertel, Hanna G. Zimmermann, with the Guthy Jackson Charitable Foundation—International Clinical Consortium and CROCTINO Collaborators   +40 more
wiley   +1 more source