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Fabrication and characterization of diffraction gratings in ophthalmic polymers by using UV direct laser interference patterning
Autors: D. Sola, S. Alamri, A.F. Lasagni, P. Artal
Journal: Applied Surface Science
Volume: 476
Pages: 128–135
Year: 2019
ISBN: 0169-4332
Abstract
The fabrication of diffractive elements in ophthalmic polymers to induce refractive index changes which may be applied for refractive correction is of great interest in the fields of Optics and Ophthalmology. In this work, polyhydroxyethyl- methacrylate and silicone […]
Adaptation to Brightness Perception in Patients Implanted With a Small Aperture
Autors: Silvestre Manzanera, Kyle Webb, Pablo Artal
Journal: American Journal of Ophthalmology
Volume: 197
Pages: 36-44
Year: 2018
ISBN: 0002-9394
Purpose:
Small apertures are successfully used to extend depth of focus in presbyopic patients implemented either as corneal inlays or intraocular lenses. The use of small apertures reduces retinal illuminance. In this study, we quantify the relative perceived brightness in […]
Assessment of subjective refraction with a clinical adaptive optics visual simulator
Autors: Lucía Hervella, Eloy A. Villegas, Pedro M. Prieto, Pablo Artal
Journal: Journal of Cataract & Refractive Surgery
Volume: 45(Issue 1)
Pages: 87 – 93
Year: 2018
ISBN: 0886-3350
Purpose: To clinically validate an adaptive optics visual simulator (VAO) that measures subjective refraction and visual acuity.
Setting: Optics Laboratory, University of Murcia, Murcia, Spain.
Design: Prospective case series.
Methods: Using the adaptive optics […]
GPU-based Processing of Hartmann-Shack Images for Accurate and High-Speed Ocular Wavefront Sensing
Autors: Juan Mompeán, Juan L. Aragón, Pedro M. Prieto, Pablo Artal
Journal: Future Generation Computer Systems
Pages: 177-190
Year: 2018
ISBN: 0167-739X
Abstract
Hartmann-Shack aberrometry is a widely used technique in the field of visual optics but, high speed and accurate process- ing of Hartmann-Shack images can be a computationally expensive/resource intensive task. While some advancements have been made in […]
Volumetric macro- and micro-scale assessment of crystalline lens opacities in cataract patients using long-depth-range swept source optical coherence tomography
Autors: Ireneusz Grulkowski, Silvestre Manzanera, Lukasz Cwiklinski, Juan Mompeán, Alberto De Castro, Jose Maria Marin, and Pablo Artal
Journal: Biomedical Optics Express
Volume: 9 (nº8)
Pages: 3821-3833
Year: 2018
ISBN: 2156-7085
Abstract
We demonstrate an optimized optical platform for the three-dimensional (3-D) visualization of crystalline lens opacities in vivo in the eyes of patients with different types and grades of cataracts. […]
Perceived brightness with small apertures
Autors:Pablo Artal y Silvestre Manzanera
Journal: Journal of Cataract & Refractive Surgery
Volume: 44 (Issue 6)
Pages: 734 – 737
Year: 2018
ISBN: 0886-3350
Abstract
Purpose: To quantify the relative perceived brightness when viewing through a small apertura as that used by presbyopic patients with small-aperture corneal inlays or intraocular lenses with an embedded aperture.
Setting: Laboratorio de Óptica, Universidad de Murcia, […]
Wavefront correction in two-photon microscopy with a multi-actuator adaptive lens
Autors: Juan M. Bueno, Martin Skorsetz, Stefano Bonora, and Pablo Artal
Journal: Optics Express
Volume: 26 (Issue 11)
Pages: 14278-14287
Year: 2018
ISBN: 1094-4087
Abstract
A multi-actuator adaptive lens (AL) was incorporated into a multi-photon (MP) microscope to improve the quality of images of thick samples. Through a hill-climbing procedure the AL corrected for the specimen-induced aberrations enhancing MP images. The […]
Light scattering in the human eye modelled as random phase perturbations
Autors: Augusto Arias, Harilaos Ginis, and Pablo Artal
Journal: Biomedical Optics Express
Volume: 9 (Issue 6)
Pages: 2664-2670
Year: 2018
ISBN: 2156-7085
Abstract
Light scattering in the eye affects the quality of vision and its effect increases with aging and related pathologies, such as cataracts. Simulating methods were developed in order to reproduce the effects of this phenomenon. We introduce a […]
High speed visual stimuli generator to estimate the minimum presentation time required for an orientation discrimination task
Autors: Lucie Sawides, Adrián Gambín-Regadera, Alberto de Castro, and Pablo Artal
Journal: Biomedical Optics Express
Volume: 9(6)
Pages: 2640-2647
Year: 2018
ISBN: 2156-7085
Abstract
How brief can a visual stimulus be and still be seen? To answer this question, we developed a digital micromirror device (DMD) based system operating at high speed (22.7 kHz) to control the rapid presentation of […]
Effect of intraocular scattering in macular pigment optical density measurements
Autors: Dimitrios Christaras, Alexandros Pennos, Harilaos Ginis, Pablo Artal
Journal: Journal of Biomedical Optics
Volume: 23 (5)
Pages: 056001-1 ; 056001-7
Year: 2018
ISBN: 1083-3668
Abstract
Fundus reflectometry is a common in-vivo, noninvasive method to estimate the macular pigment optical density (MPOD). The measured density, however, can be affected by the individual’s intraocular scattering. Scattering causes a reduction in the […]