Results 21 to 30 of about 313,761 (243)

Visual function and higher order aberration after implantation of aspheric and spherical multifocal intraocular lenses:a meta-analysis [PDF]

open access: yesInternational Journal of Ophthalmology, 2013
AIM: To assess the visual outcomes of aspheric multifocal intraocular lenses (IOLs) compared with spherical multifocal IOL after cataract surgery.METHODS:Potential prospective controlled trials that comparing aspheric multifocal IOL implantation with ...
Jian-Ping Liu   +4 more
doaj   +1 more source

Design and modeling of corneal aberration correction with diffractive IOL based on ZEMAX

open access: yesResults in Optics, 2023
This paper estimates a specific detailed diffractive aspheric bifocal intraocular lens (IOL) used to correct and reduce corneal aberration and a patient’s standard surgical implantation.
Halah A. Hashim, Mohammed Fawzi Mohammed
doaj   +1 more source

Changes in corneal asphericity and spherical aberration after femtosecond laser in situ keratomileusis

open access: yesDelta Journal of Ophthalmology, 2021
Purpose The aim of this study was to evaluate the changes in corneal asphericity (Q value) and spherical aberration after femtosecond laser in situ keratomileusis using Scheimpflug imaging.
Mohamed El-Kateb
doaj   +1 more source

One-year effect of wearing orthokeratology lenses on the visual quality of juvenile myopia: a retrospective study [PDF]

open access: yesPeerJ, 2019
Objective To study the one-year effect of wearing orthokeratology (OK) lenses on the visual quality of juvenile myopia. Methods The right eyes of 36 juvenile myopias were retrospectively studied in this work.
Yewei Yin   +10 more
doaj   +2 more sources

INDUCED SPHERICAL ABERRATION OF THE CORNEA AND STRESS ACCOMMODATION IN CHILDREN WITH MYOPIA

open access: yesРоссийский офтальмологический журнал, 2018
Purpose: to study the relationship between spherical aberrations of the cornea induced by orthokeratologic (OK) lenses and accommodation stress and to assess the effectiveness of treating accommodation overstrain with Irifrin BK 2.5 % in myopic patients ...
M. V. Makhova   +2 more
doaj   +1 more source

Effects of relative negative spherical aberration in single vision contact lens visual performance. [PDF]

open access: yesClin Optom (Auckl), 2018
Danny Kho,1 Cathleen Fedtke,1,2 Daniel Tilia,1,2 Jennie Diec,1 Jennifer Sha,1 Varghese Thomas,1 Ravi C Bakaraju1,2 1Brien Holden Vision Institute, Clinical Trial Research Centre, Sydney, NSW, Australia, 2School of Optometry and Vision Sciences ...
Kho D   +6 more
europepmc   +2 more sources

Corneal Spherical Aberration and Corneal Asphericity after Small Incision Lenticule Extraction and Femtosecond Laser-Assisted LASIK

open access: yesJournal of Ophthalmology, 2017
Purpose. To investigate corneal spherical aberration and corneal asphericity after small incision lenticule extraction (SMILE) and femtosecond laser-assisted laser in situ keratomileusis (FS-LASIK). Methods.
Hui Zhang, Yan Wang, Hua Li
doaj   +1 more source

Depth of focus and visual acuity with primary and secondary spherical aberration [PDF]

open access: yes, 2011
It is known that the depth of focus (DOF) of the human eye can be affected by the higher order aberrations. We estimated the optimal combinations of primary and secondary Zernike spherical aberration to expand the DOF and evaluated their efficiency in ...
Collins, Michael   +7 more
core   +2 more sources

High-resolution imaging of zeolite with aberration-corrected transmission electron microscopy

open access: yesAIP Advances, 2013
We demonstrated high-resolution imaging of atomic columns in zeolite frameworks with spherical aberration-corrected transmission electron microscopy (AC-HRTEM). An MFI-type zeolite was observed by AC-HRTEM with optimized optical setup.
Kaname Yoshida   +2 more
doaj   +1 more source

Limitations of correcting spherical aberration with aspheric intraocular lenses.

open access: yes, 2005
NoAspheric intraocular lenses (IOLs) are designed to correct spherical aberration in pseudophakic eyes. We predict the benefit from correcting spherical aberration based on simulations and aberrometry of pseudophakic eyes implanted with spherical IOLs ...
Cox, Michael J., Dietze, Holger H.
core   +4 more sources

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