Person:
Pérez Carrasco, María Jesús

First Name

María Jesús

Last Name

Pérez Carrasco

URI

https://hdl.handle.net/20.500.14352/79893

Affiliation

Universidad Complutense de Madrid

Faculty / Institute

Óptica y Optometría

Department

Optometría y Visión

Area

Optica

Identifiers

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Search Results

Now showing 1 - 10 of 21

Macular Thickness and Mesopic Visual Acuity in Healthy Older Subjects
(Current Eye Research, 2018) Puell Marín, María Cinta; Pérez Carrasco, María Jesús; Palomo Álvarez, Catalina
Purpose/Aim: Impaired mesopic visual acuity (VA) is a risk factor for incident early age-related macular degeneration (AMD) This study examines relationships between macular thickness measurements and photopic or mesopic VA in healthy eyes. Materials and Methods: In 38 young and 39 older healthy individuals, total, inner, and outer retinal layer (IRL and ORL) thicknesses were measured in the macula region through spectral-domain optical coherence tomography (SD-OCT). Measurements were made across three subfields centered at the fovea: central foveal, pericentral, and peripheral. Best-corrected distance high-contrast (HC) and low-contrast (LC) VA were measured using Bailey-Lovie logMAR letter charts under photopic and mesopic luminance conditions. In addition, the low luminance deficit in VA (LLD, difference between photopic and mesopic VA) was calculated. Relationships were examined through Spearman correlation in each age group and through multiple linear regressions across all eyes. Results: No significant correlations were detected between photopic VA (HC-VA and LC-VA) and macular thickness measurements in each age group. In mesopic conditions, age and pupil size were independent predictors of HC-VA (p = 0.001) and age and pericentral ORL thickness predictors of LC-VA (p = 0.001). Central foveal thickness emerged as the unique independent predictor of LLD (HC-VA, p = 0.013 and LC-VA, p = 0.005). Only in the older age group, was central foveal thicknesses correlated with LLD (HC-VA, r = + 0.45; p = 0.004 and LC-VA, r = + 0.33, p = 0.038). Conclusions: Greater macular thicknesses were related to worse mesopic VA and low luminance deficit in healthy subjects.
Síndrome de visión del ordenador: un nuevo reto para la prevención (CVS).
(Seguridad y promoción de la salud (Fundación Mapfre), 2015) Bonnin Arias, Cristina Natalia; Sánchez Ramos, Celia; Pérez Carrasco, María Jesús; Aguirre Vila-Coro, Victoria; García Rojo, Marta; Blanco Navarro, Carolina; Chamorro Gutiérrez, Eva
El presente estudio epidemiológico se ha realizado sobre una muestra de 314 personas clasificadas por el tiempo que dedicaban al uso de dispositivos con pantallas retroiluminadas, resultando dos grupos: los clasificados como usuarios (más de 3 horas) y como no usuarios (menos de 3 horas). Constatada la incidencia de estas prácticas en la aparición de problemas oculares incluso no reversibles, de las conclusiones del estudio se desprende la necesidad de que los especialistas sugieran estrategias de prevención, tales como cambios de iluminación, la adopción de hábitos saludables de posicionamiento frente al ordenador, el uso de lágrimas artificiales y la utilización de gafas y lentes de contacto especialmente diseñadas y tratadas para proteger los ojos.
Project number: 286
Atlas electrónico de registros de retinográficos y tomográficos: cribado, derivación, y modelización matématica. Parte III: Retinopatía Diabética
(2017) Sánchez Ramos, Celia; Pérez Carrasco, María Jesús; Bonnin Arias, Cristina Natalia; Llorens Casado, María Belén; Panetsos Petrova, Fivos
El objetivo de este proyecto es continuar con el Atlas retinográfico iniciado en las convocatorias anteriores con imágenes obtenidas con los principales y novedosos instrumentos utilizados en la actualidad para el diagnóstico de patologías retinianas. El Atlas presentará, además de las imágenes, una detallada descripción de los aspectos que debe tenerse en cuenta en el momento de realizar el cribado. Y además, se realizará un novedoso modelizado matemático de las imágenes. Esta tercera parte se centrará en el diagnóstico de RETINOPATÍAS DIABÉTICAS, una patología con una prevalencia del 4% de la población en general y que constituye una de las primeras causas de ceguera no reversible en los países desarrollados, causando incapacidad laboral permanente. El Atlas puede ser de gran interés para los enfermos de DIABETES ya que está probado que el 100% de los afectados a los 15 años padecen RETINOPATÍAS DIABÉTICAS. Por lo que conviene que sepan el estado del fondo de su ojo. Estará constituida por una extensa relación de retinografías (fotografías del fondo de ojo – retina) y tomografías de coherencia óptica (imágenes de cortes histológicos de la retina en vivo), exponiendo casos reales de patologías comunes y poco comunes. Constituye una herramienta con triple función: por un lado será un elemento didáctico para el aprendizaje de patologías retinianas y el método de diagnóstico por imagen; en segundo lugar, podrá utilizarse para realizar evaluaciones tipo test; y, en tercer lugar, constituirá una completa base de datos que podrá ser utilizado como material de consulta y diagnóstico comparado en la práctica clínica. En definitiva, se trata de una herramienta muy económica de gran utilidad para un amplio grupo de profesionales sanitarios expertos y especialistas en visión y en sistema ocular.
IT workers and Computer Vision Syndrome.
(2019) Rodríguez Alonso, Xabier; Gutiérrez Jorrín, Sara.; Bonnin Arias, Cristina Natalia; Pérez Carrasco, María Jesús; Panetsos Petrova, Fivos; Sánchez Ramos, Celia
In today's world, the visualization of digital screens has become a large part of daily life at home, at work, during free time and in movement. The use of data visualization terminals (desktop, laptops, tablets and smartphones) has become a universal activity. In fact, a recent report suggests that adults can pass, in average, approximately 8.5 hours per day watching digital screens. Studies suggest that between 64 and 90% of device users experience visual symptoms. These symptoms include visual fatigue, headache, eye discomfort, dry eye, diplopia and blurred vision, either in far or near vision. In this study, the risks of the use of LED screens are evaluated in working age adult population who spend large amounts of time working in front of LED screens.
Project number: 231
Atlas electrónico de registros retinográficos y tomográficos: cribado, derivación, diagnóstico diferencial y seguimiento de afecciones retinianas. Parte V: Distrofias retinianas
(2019) Sánchez Ramos, Celia; Pérez Carrasco, María Jesús; Bonnin Arias, Cristina Natalia; Blázquez Sánchez, Vanesa; Jiménez De Las Heras, José Antonio; Jimeno Aranda, Ricardo; Cuiña Sardiña, Ricardo; Navarro Blanco, Carolina; Blanco Torcal, Bárbara Prisca
El objetivo de este proyecto es continuar con el Atlas retinográfico iniciado en las convocatorias anteriores con imágenes obtenidas con los principales y novedosos instrumentos utilizados en la actualidad para el diagnóstico de patologías retinianas. El Atlas presenta, además de las imágenes, una detallada descripción de los criterios cribado. Esta quinta parte se centra en el diagnóstico por imagen de distrofias retinianas, que son un grupo heterogéneo de enfermedades hereditarias de la retina, por lo general bilaterales y progresivas, que conducen a la pérdida de visión funcional hasta la ceguera. El Atlas está constituido por una extensa relación de retinografías (fotografías del fondo de ojo–retina) y tomografías de coherencia óptica (imágenes de cortes histológicos de la retina en vivo), exponiendo casos reales de patologías comunes y poco comunes. Constituye una herramienta con triple función: por un lado, será un elemento didáctico para el aprendizaje de patologías retinianas y el método de diagnóstico por imagen; en segundo lugar, puede utilizarse para realizar autoevaluaciones y, en tercer lugar, constituye una completa base de datos de casos clínicos. En definitiva, se trata de una herramienta muy económica y de gran utilidad para un amplio grupo de profesionales sanitarios expertos y especialistas en sistema visual.
Disk halo size measured in individuals with monofocal versus diffractive multifocal intraocular lenses
(Journal of cataract and refractive surgery, 2015) Puell Marín, María Cinta; Pérez Carrasco, María Jesús; Hurtado Ceña, Francisco Javier; Álvarez Rementería Fernández, Laureano
PURPOSE: To compare disk halo size in response to a glare source in eyes with an aspheric apodized diffractive multifocal intraocular lens (IOL) or aspheric monofocal IOL. SETTING: Rementeria Ophthalmological Clinic, Madrid, Spain. DESIGN: Prospective randomized masked study. METHOD: Halo radius was measured using a vision monitor (MonCv3) with low-luminance optotypes in eyes that had cataract surgery and bilateral implantion of an Acrysof Restor SN6AD1 multifocal IOL or Acrysof IQ monofocal IOL 6 to 9 months previously. The visual angle subtended by the disk halo radius was calculated in minutes of arc (arcmin). Patient complaints of halo disturbances were recorded. Monocular uncorrected distance visual acutity (UDVA) and corrected distance visual acuity (CDVA) were measured using high-contrast (96%) and low-contrast (10%) logMAR letter charts. RESULTS: The study comprised 39 eyes of 39 subjects (aged 70 to 80 years); 21 eyes had a multifocal IOL and 18 eyes a monofocal IOL. The mean halo radius was 35 arcmin larger in the multifocal IOL group than the monofocal group (P<.05). Greater halo effects were reported in the multifocal IOL group (P<.05). The mean monocular high-contrast UDVA and low-contrast UDVA did not vary significantly between groups, whereas the mean monocular high-contrast CDVA and low-contrast CDVA were significantly worse at 0.12 logMAR and 0.13 logMAR in the multifocal than in the monofocal IOL group, respectively (P <.01). A significant positive correlation was detected by multiple linear regression between the halo radius and low-contrast UDVA in the multifocal IOL group (r = 0.72, P<.001). CONCLUSIONS: The diffractive multifocal IOL gave rise to a larger disk halo size, which was correlated with a worse low-contrast UDVA.
Acid-Sensing ion channels 2 and 4 (Asic 2 Saic 4) are regulated by light in the zebrafish retina
(2012) Sánchez Ramos, Celia; Germaná, A.; Bonnin Arias, Cristina Natalia; Chamorro Gutiérrez, E.; Navarro Valls, J.J.; García Ortega, M.; Pérez Carrasco, María Jesús; Vega, J.A.
Purpose: Acid-sensing ion channels (ASICs) are H+- gated cation channels that monitor deviations from the physiological values of extracellular pH. ASIC genes in zebrafish (zASICs) are expressed in the central nervous system and the retina. pH variations in the retina are thought to be involved in the fine-tunning of visual perception and in the adaptation of the retinal responses to different light-induced retinal degeneration. This study examines the effects of continuous light or darkness exposure in the mRNA levels and cell distribution of ASIC2 and ASIC4 in the retina of adult zebrafish.
Symptomatology associated by use of computers in university students.
(2019) Gutiérrez Jorrín, Sara; Rodríguez Alonso, Xabier; Bonnin Arias, Cristina Natalia; Pérez Carrasco, María Jesús; Panetsos Petrova, Fivos; Sánchez Ramos, Celia
The use of computers and electronic devices (tablets and smartphones) is essential in many aspects of current academic, professional and social life, as the number of people who uses this devices has increased exponentially in recent years. In fact, a recent report suggests that adults can spend, on average, approximately 8.5 hours per day watching electronic screens. Studies suggest that between 64 and 90% of device users experience visual symptoms. These symptoms include eyestrain, headaches, eye discomfort, dry eye, diplopia, and blurred vision, either in far or near vision
Variations of intraocular scattering in retinitis pigmentosa by interposing short wavelengths filters.
(2014) Sánchez Ramos, Celia; Cedrún Sánchez, Juan Enrique; Chamorro Gutiérrez, Eva.; Bonnin Arias, Cristina Natalia; Pérez Carrasco, María Jesús
The intraocular scattering is a distorting effect of the retinal image. In people with retinitis pigmentosa, the resolution of the retinal image is particularly important. The halometer (Software Halo v1.0 © 2008 Universidad de Granada) can assess quantitatively the intraocular scattering. In recent years it has been shown that the implementation of blue light filters improve visual perception in persons with low vision. The aim of this study is to assess the effect of blue light filters in mesopic perception of patients with retinitis pigmentosa studing the intraocular scattering
Impaired Mesopic Visual Acuity in Eyes with Early Age-Related Macular Degeneration
(Investigative Ophthalmology and Visual Science, 2012) Puell Marín, María Cinta; Barrio De Santos, Ana Rosa; Palomo Álvarez, Catalina; Gómez Sanz, Fernando J.; Clement Corral, Amaya; Pérez Carrasco, María Jesús
Purpose.: To determine photopic and mesopic distance high-contrast visual acuity (HC-VA) and low-contrast visual acuity (LC-VA) in eyes with early age-related macular degeneration (AMD). Methods.: Measurements were made in 22 subjects with early AMD and 28 healthy control subjects. Inclusion criteria included a photopic HC-VA of 20/25 or better. Distance VA was measured using HC (96%) and LC (10%) Bailey-Lovie logMAR letter charts under photopic (85 cd/m2) and mesopic (0.1–0.2 cd/m2) luminance conditions. Results.: Mean mesopic distance HC-VA and LC-VA were significantly worse (0.1 logMAR and 0.28 logMAR, respectively) in the early AMD group than in the control group. Under mesopic conditions, the mean difference between LC-VA and HC-VA was significantly greater in the early AMD (0.45 logMAR) than the control group (0.27 logMAR). Mean differences between mesopic versus photopic HC-VA and mesopic versus photopic LC-VA were significantly greater in the early AMD than the control group (0.13 and 0.32 logMAR of difference between the means, respectively). Sensitivity and specificity were significantly greater for mesopic LC-VA than for mesopic HC-VA (Receiver Operating Characteristics, area under the curve [AUC], 0.94 ± 0.030 and 0.76 ± 0.067, respectively). AUC values for photopic HC-VA and LC-VA were below 0.70. Conclusions.: Visual acuity testing under low luminance conditions emerged as an optimal quantitative measure of retinal function in early AMD.