Results 1 to 10 of about 3,918 (223)

On asphericity of convex bodies in linear normed spaces

open access: yesJournal of Inequalities and Applications, 2018
In 1960, Dvoretzky proved that in any infinite dimensional Banach space X and for any ϵ>0 $\epsilon> 0$ there exists a subspace L of X of arbitrary large dimension ϵ-iometric to Euclidean space.
Nashat Faried   +2 more
doaj   +2 more sources

Changes in Corneal Asphericity after MyoRing Implantation in Moderate and Severe Keratoconus [PDF]

open access: yesJournal of Ophthalmic & Vision Research, 2019
Purpose: To evaluate the effect of MyoRing implantation on corneal asphericity in moderate and severe keratoconus (KCN). Methods: This cross-sectional observational study comprised 32 eyes of 28 patients with KCN, who had femtosecond-assisted ...
Masoud Khorrami-Nejad   +4 more
doaj   +2 more sources

Posterior Corneal Asphericity Effect on Postoperative Astigmatism after EDOF Intraocular Lens Implantation in Cataract Patients

open access: yesJournal of Ophthalmology, 2021
Aim. To assess the impact of posterior corneal asphericity on postoperative astigmatism. Methods. We included retrospectively 70 eyes of 70 patients that underwent cataract surgery.
Mark Rabinovich   +6 more
doaj   +2 more sources

Comparative evaluation of visual outcomes and corneal asphericity after laser-assisted in situ keratomileusis with the six-dimension Amaris excimer laser system.

open access: yesPLoS ONE, 2017
PurposeTo compare the visual and refractive outcomes after laser-assisted in situ keratomileusis (LASIK) surgery for correction of myopia or myopic astigmatism using a six-dimensional Amaris excimer laser.MethodsIn this retrospective cohort study, we ...
JunJie Piao   +7 more
doaj   +2 more sources

Analysis of Asphericity and Corneal Longitudinal Spherical Aberration of 915 Chinese Myopic Adult Eyes

open access: yesClinical Ophthalmology, 2023
Jun Zhang, Li Zheng, Yixuan Zhang, Ke Wang Department of Ophthalmology, Hangzhou MSK Eye Hospital, Hangzhou, People’s Republic of ChinaCorrespondence: Jun Zhang, Department of Ophthalmology, Hangzhou MSK Eye Hospital, Hangzhou, People’s Republic of China,
Zhang J, Zheng L, Zhang Y, Wang K
doaj  

Comparison of Visual Performance of Monofocal Intraocular Lenses with Different Asphericities

open access: yesPhilippine Journal of Ophthalmology, 2022
Objective: To compare the visual performance and patient-reported outcomes of three types of monofocal intraocular lenses (IOL) with different asphericities.
Robert Edward T. Ang MD   +5 more
doaj  

Effect of femtosecond-assisted intrastromal implantation of MyoRing for keratoconus on corneal asphericity

open access: yesDelta Journal of Ophthalmology, 2019
Purpose The aim of this study was to evaluate the effect of implanting MyoRing into a femtosecond-created corneal pocket on corneal asphericity in patients with keratoconus.
Mahmoud M Ismail   +3 more
doaj   +1 more source

Clinical outcomes after implantation of a new intrastromal corneal ring with 140-degree of arc in patients with corneal ectasia [PDF]

open access: yesInternational Journal of Ophthalmology, 2018
AIM: To evaluate the clinical and tomographic outcomes after implantation of a new intrastromal corneal ring segment (ICRS) with 140-degrees of arc in eyes with corneal ectasia.
Jordana Sandes   +7 more
doaj   +1 more source

ON DEHN'S LEMMA AND THE ASPHERICITY OF KNOTS [PDF]

open access: yesProceedings of the National Academy of Sciences, 1957
The present paper contains a 'roof of Dehn's lemma and an analogous result that we call the sphere theorem, from which other theorems follow.' DEHN'S LEMMA. Let M be a 3-manifold, compact or not, with boundary which may be empty, and in M let D be a 2-cell with self-intersections (singularities), having as boundary the simple closed polygonal curve C ...
openaire   +4 more sources

On the swelling properties of pom-pom polymers: impact of backbone length

open access: yesCondensed Matter Physics, 2023
The present work continues our previous studies of pom-pom molecule [K. Haydukivska, O. Kalyuzhnyi, V. Blavatska, and J. Ilnytskyi, J. Mol. Liq. 328, 115456 (2021); Condens. Matter Phys. 25, 23302 (2022)].
K. Haydukivska, V. Blavatska
doaj   +1 more source

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