Results 31 to 40 of about 1,358,544 (143)

Influence of artificial tears on corneal parameter measurement using three different devices: Keratometry and Scheimpflug technology, a randomized trial

Acta Ophthalmologica, Volume 103, Issue 5, Page e310-e317, August 2025.
Abstract Purpose To evaluate the effect of artificial tear (AT) application on the repeatability of corneal parameters with three different devices. Methods In this prospective, randomized clinical trial, 145 patients were measured with one of three devices in the Department of Ophthalmology, Goethe University, Frankfurt, Germany.
Titus Schug, Thomas Kohnen, Klemens Paul Kaiser, Christoph Lwowski   +3 more
wiley   +1 more source

Atmospheric CO2 sensing using Scheimpflug-lidar based on a 1.57-µm fiber source.

Optics Express, 2019
A molecular laser-radar system, based on the Scheimpflug principle, has been constructed and demonstrated for remote sensing of atmospheric CO2 concentrations using Differential Absorption Lidar (DIAL) in the (30012←00001) absorption band.
J. Larsson, J. Bood, Can Xu, Xiong Yang, R. Lindberg, F. Laurell, M. Brydegaard   +6 more
semanticscholar   +1 more source

Assessing UVA and Laser‐Induced Crosslinking via Brillouin Microscopy

Journal of Biophotonics, Volume 18, Issue 5, May 2025.
UVA crosslinking is the primary treatment to combat keratoconus. Nevertheless, unwanted side effects and limitations due to nonselective irradiation lead to the investigation of alternative irradiation treatments. This study shows similar changes in the Brillouin frequency shift of corneas crosslinked with UVA irradiation and a NIR femtosecond laser ...
Christian A. Iriarte‐Valdez, Johannes Wenzel, Emilie Baron, Alexandra Y. Claus, Stefan Kalies, Karsten Sperlich, Oliver Stachs, Maria Leilani Torres‐Mapa, Alexander Heisterkamp   +8 more
wiley   +1 more source

Evaluation of indices for the assessment and classification of keratoconus based on optical coherence tomography and Scheimpflug technology

Ophthalmic and Physiological Optics, Volume 45, Issue 2, Page 391-404, March 2025.
Abstract Purpose To compare the parameters and indices of a novel swept‐source optical coherence tomography device (SS‐OCT, ANTERION) with those of a rotating Scheimpflug camera (RSC)‐based tomograph (Pentacam) in normal and keratoconic (KC) eyes. Methods This prospective, monocentric, cross‐sectional study included individuals with unoperated normal ...
Robert Herber, Janine Lenk, Lisa Ramm, Dierk Wittig, Maria Magdalena Patzner, Lutz E. Pillunat, Frederik Raiskup   +6 more
wiley   +1 more source

Variation of Bruch's membrane opening in response to intraocular pressure change during scleral lens wear, in a population with keratoconus

Ophthalmic and Physiological Optics, Volume 45, Issue 2, Page 405-415, March 2025.
Abstract Purpose The present study aimed to determine the potential impact of scleral lenses on intraocular pressure (IOP) by analysing the Bruch's membrane opening–minimum rim width (BMO‐MRW) while the lenses are worn, in a population with keratoconus.
Langis Michaud, Steven Balourdet, Dan Samaha   +2 more
wiley   +1 more source

Intelligent Perception and Seam Tracking System for Thick Plate Weldments Based on Constant-Focus Optical Path

Applied Sciences
To achieve efficient and accurate thick plate welding, as well as to precisely extract and plan the paths of complex three-dimensional weld seams in large steel structures, this study introduces a novel vision-guided approach for robotic welding systems ...
Lei Zhai, Wenze Ren, Fei Li, Rong Wu, Jinsong Lin, Jiahui Feng, Jun Zheng, Yang Liu   +7 more
doaj   +1 more source

Higher‐Order Aberrations, Corneal Density, and Visual Acuity After Excimer Laser Phototherapeutic Keratectomy (PTK) for Epithelial Basement Membrane Dystrophy

Journal of Ophthalmology, Volume 2025, Issue 1, 2025.
Background To evaluate visual acuity outcome after excimer laser phototherapeutic keratectomy (PTK) for epithelial basement membrane dystrophy (EBMD) and to provide new insights into higher‐order aberrations (HOAs) and corneal density changes. Methods In this single‐center cohort, 92 eyes from 80 individuals underwent PTK for EBMD, with follow‐up ...
Simon Helm, Johanna Wiedemann, Benjamin Rosswinkel, Björn Bachmann, Claus Cursiefen, Simona Schlereth, Antonio Benito   +6 more
wiley   +1 more source

Remote 3D Imaging and Classification of Pelagic Microorganisms with A Short‐Range Multispectral Confocal LiDAR

Laser &Photonics Reviews, Volume 18, Issue 10, October 2024.
A novel multispectral confocal light detection and imaging (LiDAR) system for underwater autofluorescence short‐range sensing is introduced. The instrument combines 3D high‐resolution morphological data with spectroscopic information at the voxel level.
Joaquim Santos, Hans H. Jakobsen, Paul M. Petersen, Christian Pedersen   +3 more
wiley   +1 more source

Design Method for Laser Target Simulator Illumination System With High Energy Utilization and High Uniformity

IEEE Photonics Journal
In this paper, a novel design of the illumination optical system for a laser target simulator is investigated to determine the optimal relationship between the uniformity of the illumination system and the energy utilization in a laser target simulator ...
Huibo Shao, Lingyun Wang, Haocong Zhang, Guangxi Li, Yu Chen   +4 more
doaj   +1 more source

Clinical outcomes of femtosecond laser‐assisted corneal allogenic intrastromal ring segment (CAIRS) in the treatment of keratoconus

Clinical &Experimental Ophthalmology, Volume 52, Issue 7, Page 713-723, September/October 2024.
Abstract Background To evaluate the results of corneal allogenic intrastromal ring segment (CAIRS) implantation in keratoconus. Methods The medical records of patients with keratoconus who underwent CAIRS implantation were reviewed. The CAIRS, prepared by trephination from the donor cornea, was implanted into a tunnel created using the femtosecond ...
Ahmet Kirgiz, Burcu Kemer Atik, Merve Emul, Muhittin Taskapili   +3 more
wiley   +1 more source