Person: Garzón Jiménez, Nuria
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First Name
Nuria
Last Name
Garzón Jiménez
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Óptica y Optometría
Department
Optometría y Visión
Area
Optica
Identifiers
61 results
Search Results
Now showing 1 - 10 of 61
Item Pre-operative simulation of post-operative multifocal vision(Biomedical Optics Express, 2019) Maria Viñas; Sara Aissati; Mercedes Romero; Clara Benedi-Garcia; Nuria Garzon; Francisco Poyales; Carlos Dorronsoro; Susana Marcos; Garzón Jiménez, NuriaWhile multifocal intraocular lenses (MIOLs) are increasingly implanted to correct for presbyopia, how one sees with a multifocal correction is hard to explain and imagine. The current study evaluates the quality of various visual simulating technologies by comparing vision with simulated MIOLs pre-operatively and the implanted MIOLs post-operatively in the same patients. Two simulation platforms were used: (1) a custom-developed adaptive optics (AO) system, with two visual simulator devices: a spatial light modulator (SLM) and an optotunable lens operating under temporal multiplexing (SimVis); and (2) a wearable, binocular, large field of view SimVis2Eyes clinical simulator (SimVis Gekko, 2Eyes Vision, Madrid, Spain). All devices were programmed to simulate a trifocal diffractive MIOL (POD F, FineVision, PhysIOL). Eight patients were measured pre-operatively simulating the trifocal lens and post-operatively with implantation of the same MIOL. Through-focus decimal visual acuity (TF VA) was measured (1) monocularly in monochromatic light using a four-alternative-forced-choice procedure in the AO system, and (2) binocularly using a clinical optotype in white light. Visual simulations pre-operatively predict well the TF VA performance found post-operatively in patients implanted with the real IOL. The average RMS difference between TF curves with the different visual simulators was 0.05 ± 0.01. The average RMS difference between the TF VA curves with the SimVis pre-operatively and the real MIOL post-operatively was 0.06 ± 0.01 in both platforms, and it was higher in cataract eyes (0.08 ± 0.01, on average across simulators) than in eyes with clear lens. In either group, the shape of the TF curves is similar across simulators and pre-and post-operatively. TF curves cross-correlated significantly between simulators (lag k = 0, rho = 0.889), as well as with results with the real MIOL implanted (lag k = 0, rho = 0.853). Visual simulations are useful programmable tools to predict visual performance with MIOLs, both in an AO environment and in a clinical simulator. Pre-operative visual simulations and post-operative data are in good agreement.Item Cell Pattern in Adult Human Corneal Endothelium(Plos One, 2011) Wörner, Ch.; Olguín, A.; Ruiz-García, Jose Luis; Garzón Jiménez, NuriaA review of the current data on the cell density of normal adult human endothelial cells was carried out in order to establish some common parameters appearing in the different considered populations. From the analysis of cell growth patterns, it is inferred that the cell aging rate is similar for each of the different considered populations. Also, the morphology, the cell distribution and the tendency to hexagonallity are studied. The results are consistent with the hypothesis that this phenomenon is analogous with cell behavior in other structures such as dry foams and grains in polycrystalline materials. Therefore, its driving force may be controlled by the surface tension and the mobility of the boundaries.- Project number: 9
Item Desarrollo de método para la evaluación de la rotación de alumnos en hospital universitario para realizar prácticas clínicas(2019) Garzón Jiménez, Nuria; González Pérez, Mariano; Muñoz Sanz, Miguel Angel; Arriola Villalobos, Pedro; González Blanco, Félix; Villanueva Gómez-Chacón, CeliaEl objetivo de este proyecto es el de diseñar y desarrollar un método de evaluación que permita valorar, de manera objetiva, a los alumnos de la asignatura de Prácticas Clínicas del Master de Optometría y Visión de la Facultad de Óptica y Optometría durante la realización de dichas prácticas en un Hospital Universitario con pacientes reales. Item Visual and Refractive Outcomes after Bilateral Implantation of an Enhanced Monofocal IOL: a Prospective study.(Journal of Cataract & Refractive Surgery, 2024) García Bella, Javier; Burgos Blasco, Bárbara; Vidal Villegas, Beatriz; Garzón Jiménez, Nuria; Villanueva Gómez-Chacón, Celia; García Feijoo, JuliánPurpose: To evaluate visual and refractive outcomes, as well as patient satisfaction after bilateral implantation of an enhanced monofocal intraocular lens (IOL) with emmetropia as a target refraction. Setting: San Carlos Hospital, Madrid, Spain. Design: Prospective, monocentric, non-comparative study. Methods: Adults 21 years or older suitable for cataract surgery and with corneal astigmatism < 1.50D were bilaterally implanted with the RayOne EMV IOL and followed up for 3-months. Outcomes measures included refraction, monocular and binocular uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), uncorrected intermediate visual acuity (UIVA), distance corrected intermediate visual acuity (DCIVA), and defocus curve, aberrometry, and satisfaction. Visual symptoms were assessed using the CatQuest-9SF questionnaire. Results: 50 eyes of 25 patients were included. At Month-3, the mean manifest spherical equivalent was -0.39 ± 0.28 D, with all eyes within 1.00 D. Binocularly, uncorrected, at distance, 68% of patients could read ≤ 0.0 logMAR and 95% ≤ 0.2 logMAR; at intermediate 59% of patients could read ≤0.1 and 100% ≤ 0.2 logMAR. Mean monocular CDVA was -0.03 ± 0.06 logMAR and mean monocular DCIVA was 0.28 ± 0.07 logMAR. Binocular defocus curve demonstrated a visual acuity ≤ 0.2 logMAR over a 2 D range from +1.00 D to -1.25 D. Satisfaction was good in 96% of patients. Conclusion: Bilateral implantation of an enhanced monofocal IOL with emmetropia as a target provided excellent binocular CDVA and good DCIVA, with a high level of satisfaction.- Project number: 118
Item Tecnología innovadora en abierto para una universidad inclusiva, accesible aplicada a prácticas de Optometría(2021) Bernárdez Vilaboa, Ricardo; Bartolomé Bartolomé, Gema; Boiso Calero, Antonio; Calvo Ayala, José Andrés; Cebrián Lafuente, José Luis; Garzón Jiménez, Nuria; Huerta Zavala, Pilar Angélica; Martínez Florentín, Gema; Mon López, Daniel; Ruiz Ruiz, José María; Sánchez Pérez, Isabel; Sillero Quintana, Manuel; Tomé de la Torre, Miguel Ángel; Prieto Garrido, Francisco LuisPoner la última tecnología similar a la innovación en el sector de la Optometría para atención primaria a pacientes teniendo en cuanta la inserción laboral, inclusión y accesibilidad utilizando competencias digitales simples en interacción en la nube. Item Comparison between clinical results of two diffractive multifocal lenses with the same platform but different additions(Journal of Emmetropia, 2015) Poyales Galán, Francisco; Garzón Jiménez, Nuria; Caro, Pedro; Jáñez, Oscar; Soler, Fernando; Díaz, ValentínPURPOSE: To evaluate visual results with two multifocal diffractive lenses designed with the same platform but with different additions. SETTING: Grupo Innova Ocular clinics. METHODS: A total of 50 eyes from 50 patients were included. Group 1 (n = 25) was implanted with the TECNIS® 1 ZLB +3.25 and group 2 (n = 25) with the TECNIS® 1 ZKB +2.75. Patients were assessed at 24 hours, 1 week and 1 month postoperatively. At surgical discharge, corrected (CDVA) and uncorrected distance visual acuity (UCDVA), near visual acuity (VA) at 25, 40 and 80 cm, visual quality and the defocus curve were measured. RESULTS: Changes in sphere and spherical equivalent were statistically significant (p<0.01) in both groups at 1 week and 1 month compared to preoperative values. In group 1, UCDVA logMAR at 1 month was 0.06 ± 0.02. In group 2, UCDVA at 1 month was 0.03 ± 0.03. In near vision, the TECNIS® 1 ZLB group obtained a VA logMAR of 0.35 ± 0.02 at 25 cm, 0.13 ± 0.02 at 40 cm and 0.27 ± 0.02 at 80 cm, while in the TECNIS® 1 ZKB group, the values were 0.38 ± 0.03, 0.14 ± 0.03 and 0.23 ± 0.06, respectively. No statistically significant differences were found either when results for visual quality were compared. CONCLUSION: Both the TECNIS® 1 ZLB and TECNIS® 1 ZKB are excellent options for obtaining good distance and near vision, in addition to providing good intermediate vision, especially at distances such as those required for working with computers.Item Equivalence of two optical quality metrics to predict visual acuity of multifocal pseudophakic patients(Biomedical Optics Express, 2020) Armengol Cebrian, Jesús; Garzón Jiménez, Nuria; Vega Lerin, Fidel; Altemir Gómez, Irene; Millán García Varela, María SagrarioThis article studies the relationship between two metrics, the area under the modulation transfer function (MTFa) and the energy efficiency (EE), and their ability to predict the visual quality of patients implanted with multifocal intraocular lenses (IOLs). The optical quality of IOLs is assessed in vitro using two metrics, the MTFa and EE. We measured them for three different multifocal IOLs with parabolic phase profile using image formation, through-focus (TF) scanning, three R, G, B wavelengths, and two pupils. We analyzed the correlation between MTFa and EE. In parallel, clinical defocus curves of visual acuity (VA) were measured and averaged from sets of patients implanted with the same IOLs. An excellent linear correlation was found between the MTFa and EE for the considered IOLs, wavelengths and pupils (R2 > 0.9). We computed the polychromatic TF-MTFa, TF-EE, and derived mathematical relationships between each metrics and clinical average VA. MTFa and EE proved to be equivalent metrics to characterize the optical quality of the studied multifocal IOLs and also in terms of clinical VA predictability.Item In vivo subjective and objective longitudinal chromatic aberration after bilateral implantation of the same design of hydrophobic and hydrophilicintraocular lenses(Journal of cataract and refractive surgery, 2015) Viñas Peña, María; Dorronsoro Díaz, Carlos; Garzón Jiménez, Nuria; Poyales, Francisco; Marcos Celestino, SusanaPURPOSE: To measure the longitudinal chromatic aberration invivo using psychophysical and wavefront-sensing methods in patients with bilateral implantation of monofocal intraocular lenses (IOLs) of similar aspheric design but different materials (hydrophobic Podeye and hydrophilic Poday). SETTING: Instituto de Optica, Consejo Superior de Investigaciones Cientificas, Madrid, Spain. DESIGN: Prospective observational study. METHODS: Measurements were performed with the use of psychophysical (480 to 700 nm) and wavefront-sensing (480 to 950 nm) methods using a custom-developed adaptive optics system. Chromatic difference-of-focus curves were obtained from best-focus data at each wavelength, and the longitudinal chromatic aberration was obtained from the slope of linear regressions to those curves. RESULTS: The longitudinal chromatic aberration from psychophysical measurements was 1.37 diopters (D) ± 0.08 (SD) (hydrophobic) and 1.21 ± 0.08 D (hydrophilic). From wavefront-sensing, the longitudinal chromatic aberration was 0.88 ± 0.07 D and 0.73 ± 0.09 D, respectively. At 480 to 950 nm, the longitudinal chromatic aberration was 1.27 ± 0.09 D (hydrophobic) and 1.02 ± 0.13 D (hydrophilic). The longitudinal chromatic aberration was consistently higher in eyes with the hydrophobic IOL than in eyes with the hydrophilic IOL (a difference of 0.16 D and 0.15 D, respectively). Similar to findings in young phakic eyes, the longitudinal chromatic aberration from the psychophysical method was consistently higher than from wavefront-sensing, by 0.48 D (35.41%) for the hydrophobic IOL and 0.48 D (39.43%) for the hydrophilic IOL. CONCLUSION: Longitudinal chromatic aberrations were smaller with hydrophilic IOLs than with hydrophobic IOLs of the same design.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 Optical Performance of a Monofocal Intraocular Lens Designed to Extend Depth of Focus(Journal of Refractive Surgery, 2020) Vega, Fidel ; Millán, María Sagrario ; Gil, Miguel A. ; Garzón Jiménez, NuriaPurpose: To test the performance of a new monofocal intraocular lens, intended to extend depth of focus (Tecnis Eyhance, ICB00; Johnson & Johnson Vision, Inc) (ICB-IOL), in comparison to a standard monofocal IOL (Tecnis 1-piece, ZCB00; Johnson & Johnson Vision, Inc) (ZCB-IOL) of the same platform and material. Methods: Assessment of the optical performance of the two IOLs was made in vitro using an optical test bench with a model eye. The spherical aberration, modulation transfer function (MTF), and area under the MTF (MTFa) were obtained for pupil sizes ranging from 2 to 5 mm. Through-focus MTFa curves between -3.00 and +1.00 diopters (D) were obtained with three pupil sizes (2, 3, and 4.5 mm). Halo formation was also assessed for both lenses. Results: The ICB-IOL had slightly worse optical quality at its best focus (ie, lower MTF scores at distance vision) and more negative spherical aberration than the ZCB-IOL for pupils ranging from 2 to 3 mm. The maximum of the through-focus MTFa curve of the ICB-IOL with a 2-mm pupil shifted to a myopic defocus of -0.50 D. For larger pupils (≥ 3.5 mm), there were no differences in spherical aberration, MTF scores, and halo energy between the two lenses. Conclusions: The new ICB-IOL is a modified monofocal lens with 0.50 D of additional power in its central 2-mm zone and more negative spherical aberration values, which induce a myopic shift of the maximum of optical quality and could improve intermediate vision. For pupils larger than 3.5 mm, there were no differences between IOLs. The new ICB-IOL design would produce photic phenomena comparable to a standard IOL.