Results 71 to 80 of about 2,467 (209)

Optimal designs for statistical analysis with Zernike polynomials [PDF]

, 2006
The Zernike polynomials arise in several applications such as optical metrology or image analysis on a circular domain. In the present paper we determine optimal designs for regression models which are represented by expansions in terms of Zernike ...
Dette, H., Melas, V. B., Andrey Pepelyshev, Dette, Holger, Viatcheslav B. Melas, Holger Dette, Pepelyshev, Andrey, Melas, Viatcheslav B.   +7 more
core   +1 more source

Three‐Year Visual Quality Evaluation in Children Using Orthokeratology Lenses: A Retrospective Study With OPD‐Scan III Measurements

Journal of Ophthalmology, Volume 2026, Issue 1, 2026.
Purpose To evaluate long‐term visual quality outcomes, refractive changes, and safety during orthokeratology lens wear in children with myopia over a 3‐year period. Methods We conducted a retrospective analysis of 130 myopic children aged 8–18 years who wore corneal refractive therapy (CRT) lenses from February 2021 to November 2024.
Shang Li, Yihan Guo, Lei Tian, Qianru Wu, Ao Li, Ying Jie, Antonio Queiros   +6 more
wiley   +1 more source

Effect of Corneal Incision Features on Corneal Endothelial Cell, Astigmatism, and Higher‐Order Aberrations After Implantable Collamer Lens Implantation

Journal of Ophthalmology, Volume 2026, Issue 1, 2026.
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.
I-Chun Lin, Mingrui Cheng, Mingwei Li, Yinjie Jiang, Guanghan Xu, Yadi Lei, Zhiwei Mao, Rui Ning, Xun Chen, Xiaoying Wang, Shweta Negi   +10 more
wiley   +1 more source

Effects of customized corneal cross‐linking on higher‐order aberrations in progressive keratoconus and low‐grade myopia

Acta Ophthalmologica, Volume 103, Issue 8, Page 966-973, December 2025.
Abstract Objective To evaluate the effects of customized corneal collagen cross‐linking (CXL) on higher‐order aberrations (HOAs) in keratoconus (KC): vertical coma (VC), horizontal coma (HC), spherical aberration (SA), trefoil (TF) and astigmatism, compared with the same effects in healthy eyes undergoing CXL for low‐grade myopia.
Jad Hayek, Andreas Viberg, Sofie Elving, Anneli Fredriksson, Anders Behndig   +4 more
wiley   +1 more source

Optimal designs for statistical analysis with Zernike polynomials [PDF]

n.a.
Dette, Holger, Pepelyshev, Andrey, Melas, Viatcheslav B.   +2 more
core  

Compact Spectral Imaging: A Review of Miniaturized and Integrated Systems

Laser &Photonics Reviews, Volume 19, Issue 21, November 6, 2025.
This review explores the rapid shift toward compact spectral imaging systems by examining four key design paradigms: Do‐It‐Yourself (DIY) platforms, freeform optics, filter‐on‐chip integration, and multifunctional metasurfaces. The discussion highlights critical applications in medicine, agriculture, and environmental monitoring, providing comparative ...
Sani Mukhtar, Amir Arbabi, Jaime Viegas
wiley   +1 more source

Automated alignment of XFEL nanofocusing mirrors via wavefront optimization

Journal of Synchrotron Radiation, Volume 32, Issue 6, Page 1534-1538, November 2025.
An automated alignment system for nanofocusing Kirkpatrick–Baez mirrors has been developed at SACLA. A wavefront optimization technique routinely provides nanofocused XFEL beams.An automated alignment procedure, based on wavefront measurement with a single‐grating interferometer, has been developed for precise tuning of Kirkpatrick–Baez nanofocusing ...
Jumpei Yamada, Gota Yamaguchi, Ichiro Inoue, Taito Osaka, Yuichi Inubushi, Makina Yabashi   +5 more
wiley   +1 more source

Robust designs for series estimation [PDF]

We discuss optimal design problems for a popular method of series estimation in regression problems. Commonly used design criteria are based on the generalized variance of the estimates of the coefficients in a truncated series expansion and do not take ...
Dette, Holger, Wiens, Douglas P.
core  

Impact of contact lens correction on wavefront aberrations and vision quality in keratoconus

Ophthalmic and Physiological Optics, Volume 45, Issue 7, Page 1811-1828, November 2025.
Abstract Purpose To review the optical principles of contact lens correction in keratoconus, with a focus on residual ocular wavefront error and its impact on vision performance. Findings Corneal rigid gas permeable (RGP) contact lenses, commonly used in keratoconus management, often fail to improve vision quality to levels observed in non‐diseased ...
Gavin Swartz, Khyber Alam, Alex Gentle, Laura E. Downie   +3 more
wiley   +1 more source

Zernike phase spatial filter for measuring the aberrations of the optical structures of the eye

Journal of Biomedical Photonics & Engineering, 2015
To measure directly the wavefront aberration coefficients, we propose to use the multi-order diffractive element fitted with the set of Zernike polynomials. Polynomials of lowest degree describe defocusing (ametropy) and astigmatism.
Svetlana N. Khonina, Victor V. Kotlyar, Dmitriy V. Kirsh   +2 more
doaj   +1 more source