Results 1 to 10 of about 144,816 (142)

The Aberrometric Effect of Corneal Plus Power Ring Distribution on Axial Length Growth in Myopic Children Undergoing Orthokeratology Treatment [PDF]

open access: yesChildren
Background/Objectives: Myopia progression is strongly associated with axial length (AL) elongation, and orthokeratology (Ortho-K) lens design may influence treatment outcomes. This study has the aim to evaluate the impact of lens customization as optical
Ana Maria Espín   +3 more
doaj   +2 more sources

It is a sufficient condition only, not a necessary and sufficient condition, for decomposing wavefront aberrations

open access: yesJournal of the European Optical Society-Rapid Publications, 2022
The classic equation for decomposing the wavefront aberrations of axis-symmetrical optical systems has the form, W ( h 0 , ρ , ϕ ) = ∑ j = 0 ∝ ∑ p = 0 ∝ ∑ m = 0 ∝ C 2 j + m 2 p + m m ( h 0 ...
Lin Psang
doaj   +1 more source

High order aberration and straylight evaluation after cataract surgery with implantation of an aspheric, aberration correcting monofocal intraocular lens [PDF]

open access: yesInternational Journal of Ophthalmology, 2015
AIM:To evaluate the quality of vision in respect to high order aberrations and straylight perception after implantation of an aspheric, aberration correcting, monofocal intraocular lens (IOL).METHODS:Twenty-one patients (34 eyes) aged 50 to 83y underwent
Florian T A Kretz   +3 more
doaj   +1 more source

Active Aberration Correction with Adaptive Coefficient SPGD Algorithm for Laser Scanning Confocal Microscope

open access: yesSensors, 2022
A laser scanning confocal microscope (LSCM) is an effective scientific instrument for studying sub-micron structures, and it has been widely used in the field of biological detection. However, the illumination depth of LSCMs is limited due to the optical
Kunhua Zhou   +5 more
doaj   +1 more source

Estimation of high-order aberrations and anisotropic magnification from cryo-EM data sets in RELION-3.1

open access: yesIUCrJ, 2020
Methods are presented that detect three types of aberrations in single-particle cryo-EM data sets: symmetrical and antisymmetrical optical aberrations and magnification anisotropy. Because these methods only depend on the availability of a preliminary 3D
Jasenko Zivanov   +2 more
doaj   +1 more source

Self calibration of sensorless adaptive optical microscopes [PDF]

open access: yesJournal of the European Optical Society-Rapid Publications, 2011
We present a self-calibrating scheme for microscopes using model-based wavefront sensorless adaptive optics. Unlike previous methods, this scheme permits the calibration of system aberration modes without the need for a separate wavefront sensor or ...
Thayil Anisha, Booth Martin J.
doaj   +1 more source

PRODUCIBILITY ANALYSIS OF LENS SYSTEM DURING OPTICAL DESIGN STAGE [PDF]

open access: yesНаучно-технический вестник информационных технологий, механики и оптики, 2020
Subject of Research. The paper presents the idea of combining various stages of production of optical devices in a single logical sequence from the design of optical elements, through the mechanical and technological production stages, to the calculation
Irina L. Livshits, Oliver Faehnle
doaj   +1 more source

Implantation of a Small Aperture Intraocular Lens in Eyes with Irregular Corneas and Higher Order Aberrations

open access: yesJournal of Ophthalmic & Vision Research, 2022
Purpose: Corneal irregularities can lead to high order aberrations (HOAs) and may influence the outcomes in terms of intraocular lens (IOL) selection and visual acuity assessment.
Fabrizio Franco   +8 more
doaj   +1 more source

The effects of implantable collamer lens implantation on higher order aberrations [PDF]

open access: yesInternational Journal of Ophthalmology, 2019
AIM: To evaluate the changes in higher order aberrations (HOAs) after implantable collamer lens (ICL; Staar Surgical, Nidau, Switzerland) implantation. METHODS: Totally 30 eyes of 18 patients with myopia were included in this study with an average age ...
Belma Kayhan   +3 more
doaj   +1 more source

Optical Behavior of an Enhanced Monofocal Intraocular Lens Compared with a Standard One

open access: yesApplied Sciences, 2023
The aim of this work was to compare an enhanced monofocal (RayOne EMV RAO200E, Rayner) and standard monofocal (RayOne RAO600C Aspheric, Rayner) intraocular lenses (IOLs) for three nominal powers (+10.00 D, +20.00 D and +30.00 D) as a function of the ...
María García-Montero   +4 more
doaj   +1 more source

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