http://hdl.handle.net/2117/3394 2013-05-21T12:39:44Z http://hdl.handle.net/2117/18334 Title: One-shot focusing using the entropy as a merit function Authors: Suc, Vicent; Royo Royo, Santiago; Jordan, Andres; Bakos, G.; Penev, K. 2013-03-15T09:45:27Z http://hdl.handle.net/2117/17842 Title: Comparison of B-spline and Zernike fitting techniques in complex wavefront surfaces Authors: Ares Rodríguez, Miguel; Royo Royo, Santiago; Caum Aregay, Jesús; Pizarro Bondia, Carlos Editor: Osten, Wolfgang; Gorecki, Christophe; Novak, Erik L. 2013-02-18T14:47:58Z http://hdl.handle.net/2117/17831 Title: Application of matched digital filters to noisy fringe-patterns from complex wavefronts Authors: Caum Aregay, Jesús; Arasa Marti, Jose; Royo Royo, Santiago; Ares Rodríguez, Miguel Editor: Osten, Wolfgang; Gorecki, Christophe; Novak, Erik L. 2013-02-18T13:23:04Z http://hdl.handle.net/2117/17443 Title: Measuring the accommodative response with a double-pass system: Comparison with the Hartmann-Shack technique Authors: Aldaba Arévalo, Mikel; Vilaseca Ricart, Meritxell; Díaz-Doutón, Fernando; Arjona Carbonell, Mª Montserrat; Pujol Ramo, Jaume 2013-01-21T15:11:53Z http://hdl.handle.net/2117/15038 Title: Measure of roughness of paper using speckle Authors: Pino, Abdiel; Pladellorens Mallofré, Josep 2012-02-09T15:02:59Z http://hdl.handle.net/2117/14635 Title: Determinación de propiedades superficiales del papel utilizando el análisis de la textura del patrón de speckle Authors: Pladellorens Mallofré, Josep 2012-01-18T10:20:20Z http://hdl.handle.net/2117/14553 Title: Optical quality after myopic photorefractive keratectomy and laser in situ keratomileusis: Comparison using a double-pass system Authors: Ondategui Parra, Juan Carlos; Vilaseca Ricart, Meritxell; Arjona Carbonell, Mª Montserrat; Montasell, Ana; Cardona Torradeflot, Genís; Güell, José L.; Pujol Ramo, Jaume 2012-01-16T10:22:55Z http://hdl.handle.net/2117/14446 Title: Use of light-emitting diodes in multispectral systems design: variability of spectral power distribution according to angle and time of usage Authors: Martínez, Oscar; Vilaseca Ricart, Meritxell; Arjona Carbonell, Mª Montserrat; Pizarro Bondia, Carlos; Pujol Ramo, Jaume Abstract: Multispectral systems allow the spectral and color characterization of objects using images obtained from several acquisition channels with different spectral sensitivities. Light sources based on light-emitting diodes have started to be used in multispectral systems, mainly to develop low-cost devices for the industry. In this study, the authors examine the variability of spectral power distribution according to the viewing angle of white and single color light-emitting diodes, which can have a significant impact on spectral and color accuracy. This must be taken into account if they are to be used in multispectral systems design. The spectrum drift according to the time of usage of white light-emitting diodes is also analyzed. 2012-01-10T12:07:34Z http://hdl.handle.net/2117/13878 Title: An objective scatter index based on double-pass retinal images of a point source to classify cataracts Authors: Artal, Pablo; Benito, Antonio; Pérez, Guillermo M.; Alcón, E.; de Casas, A.; Pujol Ramo, Jaume; Marin, José M. 2011-11-14T15:44:00Z http://hdl.handle.net/2117/13727 Title: Objective optical assessment of tear-film quality dynamics in normal and mildly symptomatic dry eyes Authors: Benito, Antonio; Pérez, Guillermo M.; Mirabet, Sandra; Vilaseca Ricart, Meritxell; Pujol Ramo, Jaume; Marín, José M.; Artal, Pablo Abstract: PURPOSE: To evaluate and compare the tear-film dynamics in normal eyes and in eyes with mild dry-eye symptoms using a new noninvasive optical method based on a double-pass instrument. SETTING: Hospital Universitario Virgen de la Arrixaca, Murcia, Spain. DESIGN: Evaluation of diagnostic test or technology. METHODS: Dynamic recording of double-pass retinal images during unforced tear-film breakup was performed in eyes with mild dry-eye symptoms (study group) and in an asymptomatic control group. Series of consecutive retinal images were recorded every 0.5 seconds while the patient avoided blinking. Measurements were performed under low-light conditions to naturally increase pupil diameter and maximize the method’s sensitivity. Additional clinical tests were performed for comparison and included tear breakup time (TBUT), Schirmer I tests, and a normalized questionnaire (McMonnies). From the retinal images, a quality metric, the intensity distribution index, was calculated. An objective TBUT value was estimated in each eye when the intensity distribution index surpassed a defined threshold value compared with the initial baseline. RESULTS: The study group comprised 20 eyes and the control group, 18 eyes. Symptomatic dry eyes had a typical exponential increase in the intensity distribution index with time. The objective TBUT values in the study group were comparable to the clinical TBUT estimates. CONCLUSIONS: The new objective optical method to evaluate the quality and stability of the tear film was sensitive in detecting mild symptoms of dry eye and differentiating from normal cases. The procedure may allow early detection and follow-up of patients’ tear film–related complaints. 2011-11-03T11:23:08Z http://hdl.handle.net/2117/13667 Title: Task oriented visual satisfaction and wearing success with two different simultaneous vision multifocal soft contact lenses Authors: Gispets Parcerisas, Joan; Arjona Carbonell, Mª Montserrat; Pujol Ramo, Jaume; Vilaseca Ricart, Meritxell; Cardona Torradeflot, Genís 2011-10-26T10:11:48Z http://hdl.handle.net/2117/9870 Title: Revisión normativa en óptica oftálmica (I) Authors: Lupón Bas, Marta; Fransoy Bel, Marta; Martínez Roda, Juan Antonio; Caum Aregay, Jesús 2010-10-20T18:03:33Z