Time-course of adaptation to an astigmatic correction published today in PLOS One

Adaptive optics and a best neutral focus paradigm were used to test the images perceived as neutral (non-astigmatic) by non-astigmats, habitually corrected astigmats and non-corrected astigmats. As opposed to non-astigmats, astigmatic subjects showed a bias towards astigmatic images in the first session. However, non-corrected astigmats showed a shift in their perceived neutral focus after following correction of their astigmatism by spectacles (partially 2-hours after correction, and fully 1-week, and present 6 months after correction).

The results of the study can be found at:  Vinas, M. Sawides, L. De Gracia, P. MArcos S. (PLoSONE, 2012)

New in the lab: Dr. Nandor Bekesi

We welcome Nandor Bekesi, coming to us from the University of Budapest to work on the biomechanics of the ocular elements. His background as a mechanical engineer (and PhD in materials engineering) will be greatly instrumental for the modeling and reconstruction of corneal and lens biomechanical properties and development of new ocular implants.

Collaborative agreement signed between the Institute of Optics (CSIC) and Bascom Palmer Eye Institute (University of Miami)

The Visual Optics and Biophotonics Lab  (IO-CSIC) and the Ophthalmic Biophysics Center have set up an agreement to collaborate on aspects related to crystalline lens optical properties.

The two groups have a long-standing collaborative record, with several co-authored publications and numerous mutual visits and student exchanges.

First in vivo 3-D quantitative crystalline lens topography published in Biomedical Optics Express

Quantitative 3-D Optical Coherence Topography was applied to achieve the first crystalline lens shape measurements in vivo, in three dimensions. The methodology was validated on artificial eyes and and in vitro lenses, and demonstrated in vivo in young eyes. Full anterior segment OCT provides full quantification of the geometry of the ocular components of the eye (cornea and lens). The study appears in the current issue of Biomedical Optics Express.

Full reference: Ortiz et al. In vivo human crystalline lens topography. Biomedical Optics Express, Vol. 3, Issue 10, pp. 2471-2488 (2012)

A new fluorescence corneal sectioned microscopy technique for in situ detection of Acanthomoeba published in Biomedical Optics Express

Acanthomeaba keratitis is a morbid corneal infection with challenging diagnosis. We present a new technique which combines the development of a new fluorescent marker, selective for Acanthomoeba with fluorescent sectioned (structured illumination) microscopy which allows efficient in situ detection of acanthomoebas implanted in the corneal stroma of a rabbit model cornea. The study is the result of a collaboration between the Visual Optics and Biophotonics Lab, with physico-chemist from the IQRS and IQO-CSIC, biologists from CIB-CSIC and clinicians from IOBA/FIO.

Full reference:  Marcos et al. Fluorescent labeling of Acanthamoeba assessed in situ from corneal sectioned microscopy, Biomedical Optics Express, Vol. 3, Issue 10, pp. 2489-2499 (2012)

 

 

6th EUROPEAN CONGRESS (ECCOMAS 2012)

6th EUROPEAN CONGRESS ON COMPUTATIONAL METHODS IN APPLIED SCIENCES AND ENGINEERING (ECCOMAS 2012)

University of Vienna, Austria, September 10-14, 2012

Lecture: #3248 – An orthotropic, viscoelastic model for the cornea and the effect of implanting an intrastromal ring segment
Authors: Sabine Kling, Juan José del Coz Diaz, Jose Luis Suárez, Susana Marcos
Session: MS101-2 – Computational biomechanics
Session Type: Biomechanics
Date: Wednesday, 12 September 2012
Time: 4:30 PM-6:30 PM
Room: M-HS28
Order number within session: 6

Link a more information: http://eccomas2012.conf.tuwien.ac.at/

Full program