Person: López Alonso, José Manuel
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First Name
José Manuel
Last Name
López Alonso
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Óptica y Optometría
Department
Óptica
Area
Optica
Identifiers
7 results
Search Results
Now showing 1 - 7 of 7
Item Development of an algorithm to track blinks from a face video(Proceedings. International Online Symposium of Young Optometrists (SIYO 2022), 2022) Marrakchi, Youssef; López Alonso, José Manuel; Garzón Jiménez, Nuria; González Pérez, Mariano; Universidad de ValenciaThe VI International Symposium of Young Optometrists (SIYO 2022) took place from November 14-28 2022 in its usual online format. This conference aims to create a space where young optometry students and optometry practitioners are the protagonists. This book of proceedings contains the abstracts of the different contributions to the conference. Its contents are organizing in two sections: invited and sponsored oral communication and workshops, and free communication. This last section is divided in oral communications and poster communications, comprising the conference’s different thematic areas. The Organizing Committee thanks all the young and senior researchers that have contributed their work to the conference, the members of the Scientific Commettee for their careful reviews of the works and the different enterprises and accademic or offical entities that have sponsored this event.Item Zemax OpticStudio toolbox as a method for visual quality analysis in multifocal contact lenses(Proceedings. International Online Symposium of Young Optometrists (SIYO 2022), 2022) López Raso, Alicia; López Alonso, José Manuel; Burgos Martínez , Mercedes; Ruiz Alcocer, Javier; Goodenoough ,Neil; Universidad de ValenciaThe VI International Symposium of Young Optometrists (SIYO 2022) took place from November 14-28 2022 in its usual online format. This conference aims to create a space where young optometry students and optometry practitioners are the protagonists. This book of proceedings contains the abstracts of the different contributions to the conference. Its contents are organizing in two sections: invited and sponsored oral communication and workshops, and free communication. This last section is divided in oral communications and poster communications, comprising the conference’s different thematic areas. The Organizing Committee thanks all the young and senior researchers that have contributed their work to the conference, the members of the Scientific Commettee for their careful reviews of the works and the different enterprises and accademic or offical entities that have sponsored this event.El Simposio Internacional de Jóvenes Optometristas pretende crear un espacio donde participen conjuntamente jóvenes estudiantes y profesionales de la optometría para facilitar la divulgación de sus investigaciones, así como el contacto y la colaboración. Este libro recopila los resúmenes de las diferentes contribuciones que se presentaron en su cuarta edición, que se celebró del 14 al 28 de noviembre de 2022 en su habitual formato en línea. Se organiza en dos secciones que comprenden las diferentes áreas temáticas de las conferencias, con el objetivo de mejorar la atención en el ámbito de la óptica y la optometría mediante la integración de la investigación en la práctica sanitaria.Item Contact lens fitting through assessment of tear film affectation with different designs by means of thermal camera(Frontiers in Optics / Laser Science, 2020) Durán Prieto, Elena; López Alonso, José ManuelThe study of contact lenses fitting of different designs through the impact on the tear through infrared images of the eye has been carried out. Multifocal lens design behaves as well as traditional ones.Item Comparison of soft toric contact lenses with and without prism ballast stabilization system(2022) Durán Prieto, Elena; González Pascual , María del Mar; Burgos Martínez, Mercedes; Carballo Álvarez, Jesús; López Alonso, José ManuelThe VI International Symposium of Young Optometrists (SIYO 2022) took place from November 14-28 2022 in its usual online format. This conference aims to create a space where young optometry students and optometry practitioners are the protagonists. This book of proceedings contains the abstracts of the different contributions to the conference. Its contents are organizing in two sections: invited and sponsored oral communication and workshops, and free communication. This last section is divided in oral communications and poster communications, comprising the conference’s different thematic areas. The Organizing Committee thanks all the young and senior researchers that have contributed their work to the conference, the members of the Scientific Commettee for their careful reviews of the works and the different enterprises and accademic or offical entities that have sponsored this event.Item Variation of Coma Aberration With Prismatic Soft Contact Lenses(Eye & Contact Lens, 2018) Carpena Torres, Carlos; López Alonso, José Manuel; Burgos Martínez, Mercedes; Carracedo Rodríguez, Juan Gonzalo; Carballo Álvarez, JesúsPURPOSE: To analyze the variation in vertical coma and the rest of ocular aberrations before and after fitting prismatic soft contact lenses (PSCL). METHODS: Thirty-seven eyes of 20 healthy subjects (24.30±2.03 years) were evaluated to analyze the variation in ocular wavefront aberrations before and after fitting PSCL of different base-down prism values (1.0, 1.5, and 2.0 prism diopters [PD]), designed to study its influence in the compensation of vertical coma aberration. A Hartmann-Shack sensor with a wavelength of 780 nm was used, considering a pupil size of 3 mm. In addition, the influence of PSCL in visual function under photopic conditions in terms of high-contrast visual acuity and contrast sensitivity was evaluated. RESULTS: There was statistically significant differences (P<0.05) in ocular aberrations from first to seventh order after fitting PSCL, but only the differences in vertical tilt, horizontal tilt, defocus, vertical astigmatism, and vertical coma were clinically relevant (Strehl ratio <0.8). The mean of vertical coma (μm) was 0.022±0.030 for control, 0.045±0.064 for 1.0 PD (P=0.645), 0.048±0.053 for 1.5 PD (P=0.037), and 0.074±0.047 for 2.0 PD (P<0.001). The changes in visual function under photopic conditions were not clinically relevant. CONCLUSIONS: PSCL induce a magnitude of vertical coma aberration directly proportional to prism value without affecting the rest of ocular high-order aberrations.Item Tear film dynamics with eyelid and contact lens motion for full blinks and half blinks(Proceedings. International Online Symposium of Young Optometrists (SIYO 2022), 2022) Ramasubramanian , Darshan; López Alonso, José Manuel; Hernández Verdejo, José Luis; Madrid Costa, David; Universidad de ValenciaThe VI International Symposium of Young Optometrists (SIYO 2022) took place from November 14-28 2022 in its usual online format. This conference aims to create a space where young optometry students and optometry practitioners are the protagonists. This book of proceedings contains the abstracts of the different contributions to the conference. Its contents are organizing in two sections: invited and sponsored oral communication and workshops, and free communication. This last section is divided in oral communications and poster communications, comprising the conference’s different thematic areas. The Organizing Committee thanks all the young and senior researchers that have contributed their work to the conference, the members of the Scientific Commettee for their careful reviews of the works and the different enterprises and accademic or offical entities that have sponsored this event.El Simposio Internacional de Jóvenes Optometristas pretende crear un espacio donde participen conjuntamente jóvenes estudiantes y profesionales de la optometría para facilitar la divulgación de sus investigaciones, así como el contacto y la colaboración. Este libro recopila los resúmenes de las diferentes contribuciones que se presentaron en su cuarta edición, que se celebró del 14 al 28 de noviembre de 2022 en su habitual formato en línea. Se organiza en dos secciones que comprenden las diferentes áreas temáticas de las conferencias, con el objetivo de mejorar la atención en el ámbito de la óptica y la optometría mediante la integración de la investigación en la práctica sanitaria.Item Contact lens fitting and changes in the tear film dynamics: mathematical and computational models review(Graefe's Archive for Clinical and Experimental Ophthalmology, 2024) Ramasubramanian, Darshan; Hernández Verdejo, José Luis; López Alonso, José ManuelPurpose: This review explores mathematical models, blinking characterization, and non-invasive techniques to enhance understanding and refine clinical interventions for ocular conditions, particularly for contact lens wear. Methods: The review evaluates mathematical models in tear film dynamics and their limitations, discusses contact lens wear models, and highlights computational mechanical models. It also explores computational techniques, customization of models based on individual blinking dynamics, and non-invasive diagnostic tools like high-speed cameras and advanced imaging technologies. Results: Mathematical models provide insights into tear film dynamics but face challenges due to simplifications. Contact lens wear models reveal complex ocular physiology and design aspects, aiding in lens development. Computational mechanical models explore eye biomechanics, often integrating tear film dynamics into a Multiphysics framework. While different computational techniques have their advantages and disadvantages, non-invasive tools like OCT and thermal imaging play a crucial role in customizing these Multiphysics models, particularly for contact lens wearers. Conclusion: Recent advancements in mathematical modeling and non-invasive tools have revolutionized ocular health research, enabling personalized approaches. The review underscores the importance of interdisciplinary exploration in the Multiphysics approach involving tear film dynamics and biomechanics for contact lens wearers, promoting advancements in eye care and broader ocular health research.