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Swept source optical coherence tomography and tunable lens technology for comprehensive imaging and biometry of the whole eye

Autors: IRENEUSZ GRULKOWSKI, SILVESTRE MANZANERA, LUKASZ CWIKLINSKI, FRANCISZEK SOBCZUK, KAROL KARNOWSKI, PABLO ARTAL
Journal: OPTICA (OSA)
Volume: 5 (nº1)
Pages: 010052-08 (pp. 52-58)
Year: 2018
ISBN: 2334-2536

 
Abstract
Standard optical systems in ophthalmology are strictly dedicated either to retinal or to anterior segment imaging due to the refractive properties of the eye. We demonstrate a swept source optical coherence […]

By |October 11th, 2018|Categories: 2018||0 Comments

Improved multiphoton imaging in biological samples by using variable pulse compression and wavefront assessment

Autors: Martin Skorsetz, Pablo Artal, Juan M. Bueno
Journal: Optics Comunication – Elsevier
Volume: 422 
Pages: 44 – 51
Year: 2018
ISBN: 0030-4018

 

Abstract
A variable prism-pair-based pulse compressor with wavefront aberration sensing was used to enhance multiphoton imaging in biomedical samples. This was incorporated into a custom made microscope to reduce pulse temporal length, improve the quality of images of […]

By |October 10th, 2018|Categories: 2018||0 Comments

Visual acuity in two-photon infrared vision

Autors: PABLO ARTAL, SILVESTRE MANZANERA, KATARZYNA KOMAR, ADRIÁN GAMBÍN-REGADERA, MACIEJ WOJTKOWSKI
Journal: Optica (OSA)
Volume: 4 (No. 12)
Pages: 1488 – 1491 (121488-04)
Year: 2017
ISBN: 2334-2536

 

 
Abstract
Humans can detect infrared light at wavelengths over 1000 nm, perceived as visible light of the corresponding half wavelength. This is due to a two-photon (2P) absorption process, which requires sufficiently large amounts […]

By |June 1st, 2018|Categories: 2017, Publications||0 Comments

Design of an accurate and high-speed binocular pupil tracking system based on GPGPUs

Autors: Juan Mompeán, Juan L. Aragón, Pedro M. Prieto, Pablo Artal
Journal: The Journal of Supercomputing
Volume: 74 (Issue 5)
Pages: 1836–1862
Year: 2017
ISBN: 0920-8542 (online ISSN:1573-0484)

 
Abstract
An efficient and robust pupil tracking system is an important tool in visual optics and ophthalmology. It is also central to techniques for gaze tracking, of use in psychological and medical research, […]

By |June 1st, 2018|Categories: 2017, Publications||0 Comments

Comparison of second harmonic microscopy images of collagen-based ocular tissues with 800 and 1045 nm

Autors: Juan M. Bueno, Francisco J. Ávila, and Pablo Artal
Journal: Biomedical Optics Express
Volume: 8 (11)
Pages: 5065-5074
Year: 2017
ISBN: 2156-7085

 
 
Abstract
Second harmonic generation (SHG) imaging is a well-suited multiphoton technique allowing visualization of biological tissues mainly composed of collagen with submicron resolution. Despite its inherent confocal properties, imaging of deeper layers within thick samples has still […]

By |June 1st, 2018|Categories: 2017, Publications||0 Comments

Variability in angle k and its influence on higher-order aberrations in pseudophakic eyes

Autors: Annette Harrer, Nino Hirnschall, Juan Tabernero, Pablo Artal, Petra Draschl, Sophie Maedel, Oliver Findl
Journal: Journal of Cataract Refract Surgery
Volume: 43 (8)
Pages: 1015–1019
Year: 2017
ISBN: 0886-3350

 

 

Purpose: To observe the variability in angle k in pseudophakic
patients and assess its correlation with optical biometry measurements
and higher-order aberrations (HOAs).
Setting: Hanusch Hospital, Vienna, Austria.
Design: Prospective case series.
Methods: This study included patients who […]

By |June 1st, 2018|Categories: 2017, Publications||0 Comments

Comparison of intraocular lens decentration and tilt measurements using 2 Purkinje meter systems

Autors: Sophie Maedel, Nino Hirnschall, Natascha Bayer, Sabine Markovic, Juan Tabernero, Pablo Artal, Frank Schaeffel, Oliver Findl
Journal: Journal of Cataract & Refractive Surgery
Volume: 43 (Issue5)
Pages: 648–655
Year: 2017
ISBN: 0886-3350

 

Purpose: To evaluate the difference in intraocular lens tilt and decentration measurements with 2 Purkinje meters.

Setting: Vienna Institute for Research in Ocular Surgery, Hanusch Hospital, Vienna, Austria.

Design: Prospective evaluation of […]

By |June 1st, 2018|Categories: 2017, Publications||0 Comments

Scattering contribution to the double-pass PSF using Monte Carlo simulations

Autors: Dimitrios Christaras, Harilaos Ginis, Alexandros Pennos and Pablo Artal
Journal: Ophthalmic and Physiological Optics
Volume: 37 (Issue 3)
Pages: 342–346
Year: 2017
ISBN: 0275-5408

 
Abstract

Purpose

Scattering in the eye occurs mainly at two sites: the eye’s optical media and the deeper retinal layers. Although the two phenomena are often treated collectively, their spatial domain of contribution to the double-pass Point […]

By |May 25th, 2018|Categories: 2017, Publications||0 Comments

Chromatic aberration control with liquid crystal spatial phase modulators

Autors: Jose L. Martinez, Enrique J. Fernandez, Pedro M. Prieto, And Pablo Artal
Journal: Optics Express
Volume: 25, Issue 9
Pages: 9793-9801
Year: 2017
ISBN: 1094-4087

 
Abstract:
The chromatic behavior of diffractive optical elements, exhibiting 2π-wrapped phase profiles, implemented into liquid crystal spatial light modulators (LC-SLM) is described. A wrapped phase map is only equivalent to the original continuous profile for […]

By |May 25th, 2018|Categories: 2017, Publications||0 Comments

Micrometric Control of the Optics of the Human Eye: Environment or Genes?

Autors: Juan Tabernero, Lucía Hervella, Antonio Benito, Lucía Colodro-Conde, Juan R. Ordoñana, Marcos Ruiz-Sanchez, José María Marín, and Pablo Artal
Journal: IOVS
Volume: 58 (4)
Pages: 1964–1970
Year: 2017
ISBN: 0146-0404

 

PURPOSE. he human eye has typically more optical aberrations than conventional artificial optical systems. While the lower order modes (defocus and astigmatism) are well studied, our purpose is to […]

By |May 25th, 2018|Categories: 2017, Publications||0 Comments