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The main line of research of our Group of Vision Sciences at the University of Murcia (CiVi-UM) lies in the fundamental and applied studies of accommodation and its loss with age (presbyopia).

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SIMULATING MULTIFOCALITY WITH TEMPORAL MULTIPLEXING

We have develloped a methology for generating simultaneous vision with a deformable mirror that changed shape at 50 Hz between two vergences. This methodology can be used to investigate subjective visual performance for different multifocal contact or intraocular lens designs.

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CRISTALLINE LENS HAS A REALLY EFFICIENT OPTICAL DESIGN

The inner gradient of curvature is shown to determine the effect of the GRIN structure in enhancing crystalline lens power and accommodation. This could explain the lens paradox or the intracapsular mechanism of accommodation.

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NEW METHOD TO DIFFERENTIATE LARGE FROM SAMLL PARTICLES IN INTRAOCULAR LENSES

A new methodology has been designed to measure straylight from intraocular lenses (IOLs) in vitro, which allow us to study the straylight-wavelength dependency for IOLs. Several IOLs were analyzed showing that large particles were found to predominate in scattering (Mie difussion).

Click on the image to see the article.

Myopes accommodate more than hyperopes

Imagine two eyes with the same optics that change their lens exactly the same during accommodation, but one has a larger vitreous chamber length than the other (i.e. one is myope and the other is hyperope): do they accommodate the same? The answer is NO. The one with a larger vitreous chamber length (myope) accommodates more! We show why in this article published in IOVS.
accommodation

Novel methodology to improve visual quality

If the optics of an eye shows part that produces deteriorated retinal images, why not to hide them instead to corrected their optics? That is the simple solutions that we have proposed in this article published in Biomedical Optics Express. We spatially modulating the amplitude of light passing into the eye (related to the eye’s transmittance), in contrast to traditional correction of the wavefront phase (related to the local refractive power). Numerical simulations show that masking the aberrated areas at the pupil plane should enhance visual function, especially in highly aberrated eyes. This correction could be implemented in practice using customized contact or intraocular lenses.
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8 studies presented in the worldwide largest Vision meeting (ARVO2016, Seattle)

Several members and collaborators from CiViUM have presented recently some research studies in the Annual Meeting organized by the Association for the çResearch in Vision and Ophthalmology (ARVO), celebrated in Seattle (WA, USA).

Seattle

The papers and posters presented were:

  • G. Labuz et al. Straylight from explanted intraocular lenses.
  • E. Papadatou et al. Assessing the optical quality of commercially available intraocular lenses by means of modulation transfer function and straylight.
  • J. Zapata-Diaz et al. Impact of higher-order aberrations on depth-of-field.
  • I. Marin-Frach et al. Does dynamic accommodation respond to the shape of the blurred retinal image without changes in physical vergence?
  • P. Bernal-Molina et al. Effect of phenylephrine on static and dynamic accommodation.
  • N. Lopez-Gil et al. Retinal blood vessels may be used to detect the sign of defocus.
  • S. Bonaque-Gonzalez et al. Improving vision by pupil shape optimization. (Awarded with a ARVO travel grant).
  • M. Jaskulski et al. Retinal Image Simulation and Image Quality Estimation of MPlus Multi-Focal IOL’s Based on Aberrometric Data.

Link for the full abstracts: http://www.arvo.org/online_planner/

Summer Course on Current Aspects of Vision with professors Arthur Bradley and Feng Xu of the University of Indiana

Between the 2 and the 4 of september, in the beautiful locale of Águilas (Murcia) we will celebrate the XIII edition of the Summer Course on the Current Aspects of Vision. Various professors and vision professionals will give talks and practical workshops, and there also a round table will be held where all of the important questions about clinical practice will be answered. This year we have the pleasure of hosting the professors Arthur Bradley and Feng Xu, from the School of Optometry of the University of Indiana, who will tell us about the applications of new technologies to vision.

Unimar 2016
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Just like each year, various commercial companies will finance the stay of the first 30 students inscribed. If interested, please contact: visionunimar@gmail.com.
Inscriptions: https://www.um.es/unimar/.
We are looking forward to seeing you there!

All the best,
Norberto López Gil and Vicente A. Fernández Sánchez (directors of the course).

The Nobel Prize that Einstein never won

Editorial in Journal of Optometry which explains why Albert Einstein never won the Nobel Prize by his Theory of Relativity: http://www.sciencedirect.com/science/article/pii/S1888429615001004
Norberto_en_Estocolmo

Adding spherical aberration with the hyperopic LASIK

Sergio Bonaque (CiViUM and Instituto Oftalmológico Amigó) has published a new manuscript in the Journal of Refractive Surgery in collaboration with the University of Oklahoma (USA). In this paper they indicate how to reduce the induction of spherical aberration in the hyperopic LASIK. These results are applicable when the WaveLight Allegretto platform is used, a very common refractive surgery laser used in Europe.
http://www.healio.com/ophthalmology/journals/jrs/2015-12-31-12/%7B90218bb1-2ef2-4e7a-bc48-d68909395f15%7D/control-of-induced-spherical-aberration-in-moderate-hyperopic-lasik-by-customizing-corneal-asphericity

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