23 posts · 13,884 views
Optics Confidential is a blog with questions and answers on optical research, with emphasis in Visual, Ophthalmic and Biomedical Optics. The social impact of science and career development of young scientists is also covered.
Pablo Artal
23 posts
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- February 18, 2010
- 07:00 AM
- 84 views
Chromatic aberration of the eye: to correct or not to correct?
by Pablo Artal in Optics confidential
The human eye suffers of a very large chromatic aberration. This means that when a red object is in focus, a blue one at the same distance will be clearly out of focus. Why we are not yet routinely correcting this defect to improve vision? You will find here some new experiments, results and explanations...... Read more »
Artal, P., Manzanera, S., Piers, P., & Weeber, H. (2010) Visual effect of the combined correction of spherical and longitudinal chromatic aberrations. Optics Express, 18(2), 1637. DOI: 10.1364/OE.18.001637
- December 30, 2009
- 06:45 AM
- 169 views
2010, the year when 20/10 vision was promised
by Pablo Artal in Optics confidential
The promise of perfect "20/10" vision for everybody appeared to be a real possibility in the early 2000's. 2010 is already here and your doctor cannot offer you yet supervision...... Read more »
Santamaria, Artal, Bescos. (1987) Determination of the point spread function of human eyes using a hybrid optical-digital method. J.Opt.Soc.Am.A., 1109. info:/
- December 13, 2009
- 04:00 PM
- 200 views
Science and politics... and scientists turned politicians
by Pablo Artal in Optics confidential
Some examples and some advice on scientists becoming politicians...... Read more »
Binocular adaptive optics visual simulator. (2009) Binocular adaptive optics visual simulator. Optics Letters. info:/
- October 31, 2009
- 01:24 PM
- 313 views
My research paper was rejected to be published. What can I do?
by Pablo Artal in Optics confidential
Prof. Artal. I am postdoctoral researcher working in Physics in an east-European country. I published several articles in high impact journals during my PhD thesis. However, the first article I submitted from my new research was rejected by the editor of the journal. I am quite disappointed since I believe the research was good (in fact the best I ever did) and moreover, the reasons for the rejection were not convincing. I feel very depressed and even thinking quiting my research career. If any........ Read more »
A. Guirao, M. Redondo, P. Artal. (2000) Optical aberrations of the human cornea as a function of age. J. Opt. Soc. Am. A,, 1697. info:/
- September 29, 2009
- 06:02 AM
- 299 views
How we see? How they see? Simulation of vision in myopia, catract, supervision...
by Pablo Artal in Optics confidential
Short lecture of Pablo Artal, professor of Optics at the University of Murcia in Spain on how different persons see the world. Based in the use of a unique research tool: the adaptive optics visual simulator. Learn how a myopic person sees, or a person with cataract or how a lucky individual with "supervision" can read letters at great distance!... Read more »
E. J. Fernández, S. Manzanera, P. Piers, P. Artal. (2002) Adaptive optics visual simulator. J. Refract. Surg. info:/
- August 30, 2009
- 06:11 PM
- 387 views
Binocular adaptive optics visual simulator: the future of visual testing
by Pablo Artal in Optics confidential
A recently developed adaptive optics instrument for the two eyes is described. The way on how eventually this system may change the traditional and old fashioned way of testing vision and prescribing spectacles is discussed...... Read more »
Fernández, E., Prieto, P., & Artal, P. (2009) Binocular adaptive optics visual simulator. Optics Letters, 34(17), 2628. DOI: 10.1364/OL.34.002628
- August 4, 2009
- 05:00 PM
- 417 views
Can myopia progression be controlled?
by Pablo Artal in Optics confidential
Myopia is a refractive condition that eventually could be controlled by spectacles designed to change the optics in the periphery of the retina. Some of the new results on this exciting topic are described...... Read more »
Linda Lundström,Alejandro Mira-Agudelo,, & Pablo Artal. (2009) Peripheral optical errors and their change with accommodation differ between emmetropic and myopic eyes. Journal of Vision, 9(6), 1-11. info:/
- June 24, 2009
- 05:00 AM
- 569 views
Should you attend so many meetings?
by Pablo Artal in Optics confidential
Why scientific meetings are important for a career and some comments on a recent meeting on adaptive optics in Russia...... Read more »
F. Vargas-Martín, P. M. Prieto, P.Artal. (1998) Correction of the aberrations in the human eye with a liquid crystal spatial light modulator: Limits to the performance. J.Opt.Soc.Am.A., 2552.
- June 2, 2009
- 04:58 PM
- 642 views
Plagiarism... what can be done? simply suffer it?
by Pablo Artal in Optics confidential
Some comments on the impact of plagiarism on science. How affect scientists; what can we do as scientists and more... (ah! and some recommendations on restaurants too).... Read more »
P.Artal, S. Marcos, R. Navarro, D. R. Williams. (1995) Odd aberrations and double-pass measurements of retinal image quality. J. Opt. Soc. Am. A, 195.
- May 19, 2009
- 06:37 AM
- 493 views
Ultrafast lasers to see the eye
by Pablo Artal in Optics confidential
The use of ultrafast (femtosecond) lasers as a tool to see (image) the eye structures is reviewed. In particular, how multiphoton microscopes can be improved by aberration correction and how impressive images from ocular tissues could help diagnosis and treatment of eye's diseases... ... Read more »
Bueno, J., Vohnsen, B., Roso, L., & Artal, P. (2009) Temporal wavefront stability of an ultrafast high-power laser beam. Applied Optics, 48(4), 770. DOI: 10.1364/AO.48.000770
- April 15, 2009
- 07:35 AM
- 682 views
Light adjustable intraocular lenses: the future is here
by Pablo Artal in Optics confidential
A new type of light adjustable intraocular lenses promises patients to be spectacles-free after cataract surgery. See a description of these new lenses and how the optical results after sugery were controlled using a Hartmann-Shack wavefront sensor based refraction approach...... Read more »
P. M. Prieto, F. Vargas-Martín, S. Goelz, P. Artal. (2000) Analysis of the performance of the Hartmann-Shack sensor in the human eye. J. Opt. Soc. Am. A, 1388.
- March 31, 2009
- 05:00 AM
- 607 views
Scatter and spherical aberration: a good marriage in the eye?
by Pablo Artal in Optics confidential
A (relatively) simple description of a new recent finding in the optics of the human eye: the compensatory effect of spherical aberration and scatter...... Read more »
Guillermo M. Pérez,Silvestre Manzanera . (2009) Impact of scattering and spherical aberration in contrast sensitivity. Journal of Vision, 9(3), 1-10. DOI: http://www.journalofvision.org/9/3/19/
- March 17, 2009
- 05:00 AM
- 655 views
Exploring the eye with invisible light
by Pablo Artal in Optics confidential
On how invisible infrared light can be used as a tool to study the optics of the human eye...... Read more »
Fernández, E., & Artal, P. (2008) Ocular aberrations up to the infrared range: from 6328 to 1070 nm. Optics Express, 16(26), 21199. DOI: 10.1364/OE.16.021199
- February 26, 2009
- 12:00 AM
- 1,097 views
Eyes are not centered optical systems...
by Pablo Artal in Optics confidential
The different optical components of the eye, the cornea and the crystalline lens are not properly aligned with the area of the retina (the fovea) providing the highest spatial resolution. Some information on this issue and a description of a new instrument to measure eye misalgnment is presented...... Read more »
J. Tabernero, A. Benito, V. Nourrit, and P. Artal. (2006) Instrument for measuring the misalignments of ocular surfaces. Optics Express, 10945-10956.
- February 9, 2009
- 12:00 AM
- 657 views
Adaptive optics... a technology for everything
by Pablo Artal in Optics confidential
Adaptive optics is a technology to obtaing better images. Initially applied in large telescopes, moved to the eye and now is expanding to a large range of interesting applications...... Read more »
E. J. Fernández, I. Iglesias, P.Artal,. (2001) Closed-loop adaptive optics in the human eye . Opt. Lett., 746-748.
- February 1, 2009
- 12:00 AM
- 796 views
Aspheric intraocular lenses: mimicking the young eye
by Pablo Artal in Optics confidential
Aspheric intraocular lenses provide cataract patients with better quality of vision. The history of how these lenses were developed trying to copy the optical properties of young eyes is described ... Read more »
P. Artal, E. Berrio, A. Guirao, P. Piers. (2002) Contribution of the cornea and internal surfaces to the change of ocular aberrations with age. J.Opt.Soc.Am.A., 137.
- January 7, 2009
- 12:00 AM
- 860 views
A simple description of the eye: structure and optical function
by Pablo Artal in Optics confidential
An easy description of the human eye: structure and optical functioning... Read more »
P. Artal, A. Benito, J. Tabernero. (2006) The human eye is an example of robust optical design. Journal of Vision, 1-7.
- December 9, 2008
- 12:00 AM
- 758 views
Myopia research: some news
by Pablo Artal in Optics confidential
Some of the new advances in myopia research presented in a recent meeting is revised. In particular, I cover the differences in the optical properties of the myopic eye in the peripheral retina and the future potential optical approaches to control myopia development based in these findings.... Read more »
Seidemann et al. (2002) Peripheral refractive errors in myopic, emmetropic, and hyperopic young subjects. J. Opt. Soc. Am. A, 2363.
- November 25, 2008
- 12:00 AM
- 858 views
Neural adaptation to the eye optics
by Pablo Artal in Optics confidential
The visual system could be adapted to the particular optical properties of each person's eyes. An experiment using an adaptive optics visual simulator was used to demonstrate this hypothesis. Some details of the experiment and the impact of the finding are discussed...
... Read more »
Pablo Artal, Li Chen, Enrique J. Fernández, Ben Singer,Silvestre Manzanera,David R. Williams. (2004) Neural compensation for the eye's optical aberrations. Journal of Vision, 4(4), 281-287. DOI: 10.1167/4.4.4
- October 29, 2008
- 12:00 AM
- 847 views
To be cited or not to be cited
by Pablo Artal in Optics confidential
Citations etiquette is a very important part of scientific research. Some comments on the topic and a practical example of one of my early papers where I first describe how to simulate retinal images of any object in real eyes for different conditions. The approach was widely used later but the paper poorly cited...... Read more »
P. Artal. (1990) Calculations of two-dimensional foveal retinal images in real eyes. J.Opt.Soc.Am.A., 1374-1381.
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