Person:
Bonnin Arias, Cristina Natalia

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First Name
Cristina Natalia
Last Name
Bonnin Arias
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Óptica y Optometría
Department
Optometría y Visión
Area
Optica
Identifiers
UCM identifierORCIDScopus Author IDWeb of Science ResearcherIDDialnet IDGoogle Scholar ID

Search Results

Now showing 1 - 10 of 12
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    Project number: PIMCD444/23-24
    Vídeos didácticos de patologías sistémicas con impacto en la salud visual utilizando software de animación
    (2024) Sánchez Ramos, Celia; Bonnin Arias, Cristina Natalia; Llorens Casado, María Belén; Blázquez Sánchez, Vanesa; Pitarch Velasco, Aída; Dorronzoro Ramírez , Emilio; Ortín Trujillano, Francisco Javier; Toure Sarr, Mame Diatou; Baoud Ould Haddi, Innas; Flores Cervantes, Merire Dayan; Martínez Álvarez, Belén; Bueno Fernández, Sara
    Vídeos didácticos de animación que permita conocer de manera gráfica y visual las más prevalentes patologías sistémicas generales, infecciosas y neurodegenerativas, que cursan con afectación ocular. Los vídeos de animación se generan mediante un software que permite crear vídeos realistas y profesionales a personas no expertas en diseño gráfico. Se trata de elementos audiovisuales que transfieren el contenido de un tema, de forma esquemática, mediante dibujos en pizarra blanca que, aparentemente, se realiza durante la explicación del tema. En cada vídeo se tratará una patología sistémica (general, infecciosa y neurodegenerativa) y las afecciones oculares relacionadas con ellas.
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    Development of a Method to Potentially Substitute Direct Evaluation of Mesopic Visual Acuity in Drivers
    (International Journal of Environmental Research and Public Health, 2021) García Rojo, Marta María; Bonnin Arias, Cristina Natalia; Chamorro Gutiérrez, Eva; Álvarez Peregrina, Cristina; Sánchez Ramos, Celia
    (1) Background: In mesopic lighting conditions, or under adverse environmental circumstances, visual information is reduced, which increases the risk of traffic accidents. This effect could be reduced with a precise evaluation of the visual function under mesopic conditions, but it is difficult to replicate in clinics. This study aims to develop an easy-to-adopt method to evaluate mesopic visual acuity (VA) in drivers. (2) Methods: Prospective and observational study in drivers. logMAR mesopic VA was compared with photopic VA measured under different combinations of contrast charts and filters to find the combination that responds best to mesopic conditions. (3) Results: Fifty-six drivers were examined. The best correlation was found with an 80% density filter and a Weber contrast chart of 20%. The logMAR VA for this combination was 0.01 ± 0.11, which was close to the mesopic VA values (0.01 ± 0.12). The difference between both logMAR VA was 0.00 ± 0.06 (R = 0.86; p ≤ 0.001; ICC = 0.86). (4) Conclusions: The use of 20% contrast optotypes and the interposition of an 80% filter under photopic conditions provide VA values similar to those measured under mesopic lighting conditions, making this simple system a good predictor of mesopic VA values.
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    Retinal protection from LED-backlit screen lights by short wavelength absorption filters
    (Cells, 2021) Sánchez Ramos, Celia; Bonnin Arias, Cristina Natalia; Blázquez Sánchez, Vanesa; Aguirre Vilacoro, Victoria; Cobo Díaz, Teresa; García Suárez, Olivia; Pérez Carrasco, María Jesús; Álvarez Peregrina, Cristina; Vega Álvarez, José Antonio
    Background: Ocular exposure to intense light or long-time exposure to low-intensity short-wavelength lights may cause eye injury. Excessive levels of blue light induce photochemical damage to the retinal pigment and degeneration of photoreceptors of the outer segments. Currently, people spend a lot of time watching LED screens that emit high proportions of blue light. This study aims to assess the effects of light emitted by LED tablet screens on pigmented rat retinas with and without optical filters. Methods: Commercially available tablets were used for exposure experiments on three groups of rats. One was exposed to tablet screens, the other was exposed to the tablet screens with a selective filter and the other was a control group. Structure, gene expression (including life/death, extracellular matrix degradation, growth factors, and oxidative stress related genes), and immunohistochemistry in the retina were compared among groups. Results: There was a reduction of the thickness of the external nuclear layer and changes in the genes involved in cell survival and death, extracellular matrix turnover, growth factors, inflammation, and oxidative stress, leading decrease in cell density and retinal damage in the first group. Modulation of gene changes was observed when the LED light of screens was modified with an optical filter. Conclusions: The use of short-wavelength selective filters on the screens contribute to reduce LED light-induced damage in the rat retina.
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    Project number: 300
    Guía gráfica de afecciones oculares secundarias a patologías sistémicas
    (2023) Sánchez Ramos, Celia; Bonnin Arias, Cristina Natalia; Lobato Rincón, Luis Lucio; Llorens Casado, María Belén; Pitarch Velasco, Aída; Bueno Fernández,Sara; Blázquez Sánchez, Vanesa; Dorronzoro Ramirez, Emilio; Domínguez Valdés, Teresa; Ortín Trujillano, Francisco Javier
    Esta guía didáctica constituye una completa base de datos de patologías sistémicas generales, infecciosas y neurodegenerativas, que sirve tanto de material de aprendizaje y autoevaluación para estudiantes, así como de material de consulta y comparación para profesionales del área de Ciencias de la Visión y Oftalmología.
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    Project number: 142
    Diseño y creación de recursos digitales para elaborar, tutorizar y evaluar un Trabajo Fin de Grado en el sistema híbrido de enseñanza presencial-virtual
    (2021) Bonnin Arias, Cristina Natalia; Santurtun de la Hoz, Maria Jesus; Lorente Velázquez, Amalia; Pitarch Velasco, Aída; Puell Marín, María Cinta; Torre Adrados, Almudena Rosario De La; Domínguez Valdés, María Teresa; Feijoo Garcia, Jennifer
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    Efectos en la función visual de diferentes diseños de lentes intraoculares implantadas de forma monocular, en diferentes condiciones de iluminación. Estudio piloto
    (Temas actuales de Optometría, SIYO 2022, 2022) Baoud Ould Haddi, Inas; Flores Cervantes, Merire Dayan; Bonnin Arias, Cristina Natalia; Blázquez Sánchez, Vanesa; Dorronzoro Ramirez, Emilio; Sánchez Ramos, Celia; Luque Cobija, Mª José; Bueno Gimeno, Inmaculada; Hernández Andrés, Rosa Mª; García Domene, Mª Carmen; Esteve Taboada, Jose Juan; Díez Ajenjo, Mª Amparo; Monsálvez Romín, Daniel; Ortí Navarro, Susana; Porcar Izquierdo, Esteban; Fez Sáiz, Dolores, de
    Objetivo: Comparar los efectos de diferentes diseños de lentes intraoculares sobre la función visual de pacientes sometidos a cirugía de cataratas monocular en diferentes condiciones de iluminación. Métodos: Estudio piloto observacional, prospectivo y transversal de 14 ojos de 14 pacientes con edades comprendidas entre los 59 y los 82 años (70,5 ± 8,6), que se sometieron a una cirugía de cristalino con diferentes tipos de lentes intraoculares: Tecnis® Eyhance™ (Johnson&Johnson Surgical Vision, Inc., Santa Ana, CA), la PhysiOL® IsoPure 123™ (BVI Medical/PhysIOL, Lieja, Bélgica) y AcrySof ® IQ Vivity™ (Alcon Laboratories, Inc, Fort Worth TX.). El estudio fue aprobado por el Comité de Ética del Hospital Clínico San Carlos de Madrid. Los sujetos participantes mostraron su acuerdo a colaborar firmando un consentimiento informado. Las pruebas se realizaron transcurrido el día, la semana y mes de la intervención, siendo estos últimos los resultados que se incluyeron en este estudio. Se midió la refracción manifiesta del paciente y la agudeza visual corregida monocularmente en distancia lejana, intermedia y cercana. Estas pruebas se realizaron en condiciones de iluminación fotópica y mesópica. Para el análisis de los datos obtenidos en este estudio se utilizó el software estadístico SPPS versión 28. Resultados: Sólo se obtuvieron valores estadísticamente significativos al comparar la agudeza visual de cerca en condiciones de iluminación fotópica entre las lentes Eyhance y Vivity con un p-valor de 0,013. Mientras que en visión lejana e intermedia, no se obtuvieron diferencias estadísticamente significativas en diferentes condiciones con distintas iluminaciones. Conclusiones: Las tres LIO proporcionaron buenos resultados visuales a distancias lejanas, intermedias y cercanas, tanto en condiciones fotópicas como mesópicas. En general, la lente Isopure 123 proporciona mejor visión en distancia lejana e intermedia, en cambio en cerca la lente que da mejor resultado es la lente Eyhance.
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    RapiDA V1: Repeatability
    (2023) Martínez Álvarez, Belén; Toure Sarr, Mame Diatou; Sarco Silva Erika; Bonnin Arias, Cristina Natalia; Blázquez Sánchez, Vanesa; Sánchez Ramos, Celia
    Dark Adaptation (DA) refers to the slow recovery of visual sensitivity in the dark, mediated primarily by rods, after being exposed to intense or prolonged illumination. It has been shown that DA is slower in aging and in age-related eye diseases such as macular degeneration (AMD). It may be a key biomarker of retinal health. (Murray et al., 2022) Traditionally the method of measuring DA with produces a triphasic curve which can last between 30 to 40 minutes. The RapiDA device, has been designed to produce a biphasic curve: the alpha point, cone threshold (CT), tau, the cone time constant and S2 the slope of the rod-only section. These data can be collected within 10 minutes.
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    Analysis of the effects of visual quality under different light conditions in different introcular lenses: study pilot
    (2022) Baoud OuldHaddi, Inas; Dorronzoro Ramirez, Emilio; Blázquez Sánchez, Vanesa; Bonnin Arias, Cristina Natalia; Sánchez Ramos, Celia
    Cataract is the opacity of the crystalline and is the leading cause of blindness and visual impairment worldwide. Cataract surgery is currently the only treatment to restore vision. In addition, said surgery is being performed earlier and earlier due to the visual demands thatrequire good vision at all distances. Especially, in intermediate distances due to the appearance of new technologies and the continuous work on screens. For this reason, there is a continuous evolution of IOL designs. The aim of this study is to compare the effects on visual function and quality of life in cataract patients undergoing cataract surgery between different Extended depth of focus (EDOF) lenses, when subjected to different illumination conditions (mesopic and photopic)
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    Effect of the type of lens implanted on quality of life under different lighting conditions.
    (2022) Baoud Ould Haddi, Inas; Flores Cervantes, Merire Dayan; Sánchez Ramos, Celia; Bonnin Arias, Cristina Natalia; Blázquez Sánchez, Vanesa
    La catarata es la principal causa de ceguera reversible y baja visión en todo el mundo. Actualmente, la cirugía es el único tratamiento para poder restaurar la visión. Por ello en los últimos años, se han desarrollado diferentes tipos de lentes intraoculares (LIO) para mejorar la visión y disminuir la dependencia de las gafas. El objetivo es comparar los efectos de diferentes tipos de lentes intraoculares implantadas de cirugía de cataratas o lensectomía refractiva sobre la función visual y calidad de vida en diferentes condiciones de iluminación (fotópica y mesópica).
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    Analysis of the effects of visual quality under different light conditions with monocular implantation of different introcular lenses: a pilot study.
    (2022) Baoud Ould Haddi, Inas; Flores Cervantes, Merire Dayan; Bonnin Arias, Cristina Natalia; Blázquez Sánchez, Vanesa; Sánchez Ramos, Celia
    Cataract is the opacity of the crystalline and is the leading cause of blindness and visual impairment worldwide. Cataract surgery is currently the only treatment to restore vision. In addition, said surgery is being performed earlier and earlier due to the visual demands that require good vision at all distances. [3] Especially, in intermediate distances due to the appearance of new technologies and the continuous work on screens. For this reason, there is a continuous evolution of IOL designs. The aim study is to compare the effects on visual function and quality of life under different light conditions (photopic and mesopic) in patients undergoing cataract or refractive lensectomy with monocular implantation with different models of lenses.