Now showing items 1-12 of 147

    • Trade-off asymmetric profile for extended-depth-of-focus ocular lens 

      Romero Pérez, Lenny Alexandra; Marrugo Hernandez, Andrés Guillermo; Millán Garcia-Varela, M. Sagrario (2022-02-01)
      Article
      Open Access
      We explore the possibility of extending the depth of focus of an imaging lens with anasymmetric quartic phase-mask, while keeping the aberration within a relatively low level. Thiscan be intended, for instance, for ophthalmic ...
    • Compliance versus risk awareness with contact lens storage case hygiene and replacement 

      Cardona Torradeflot, Genís; Alonso Matarín, Silvia; Yela Paradas, Sandra (Wolters Kluwer, 2022-02-14)
      Article
      Restricted access - publisher's policy
      Significance: Compliance with hygiene and replacement of contact lens storage cases is key to avoid contact lens contamination and anterior ocular surface complications. However, compliance levels with these accessories ...
    • Skin color correction via convolutional neural networks in 3D fringe projection profilometry 

      Barrios Montes, Erik Miguel; Pineda, Jesús; Romero Pérez, Lenny Alexandra; Millán Garcia-Varela, M. Sagrario; Marrugo Hernandez, Andrés Guillermo (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2021)
      Conference lecture
      Restricted access - publisher's policy
      Fringe Projection Profilometry (FPP) with Digital Light Projector technology is one of the most reliable 3D sensing techniques for biomedical applications. However, besides the fringe pattern images,often a color texture ...
    • Comparison of visual performance between two aspheric monofocal intraocular lens models 

      Poyales, Francisco; Garzon, Nuria; Rico del Viejo Miranza, Laura; Zhou, Ying; Millán Garcia-Varela, M. Sagrario; Vega Lerín, Fidel (Taylor & Francis, 2021-12-07)
      Article
      Restricted access - publisher's policy
      Clinical relevance It is important to distinguish between visual acuity, optical quality and quality of vision when outcomes obtained with intraocular lenses are evaluated. These parameters, that includeobjective and ...
    • Pupil size differences between female and male patients after cataract surgery 

      Ordiñaga Monreal, Enrique; Castanera Gratacós, Diego; Castanera de Molina, Fernando; Fambuena Muedra, Isabel; Vega Lerín, Fidel; Millán Garcia-Varela, M. Sagrario (Elsevier, 2022-04)
      Article
      Open Access
      Purpose To evaluate the changes in pupil diameter in women and men after cataract surgery. The correlation of pupillary changes with the variables age and anterior chamber depth will be analyzed. Methods The values of 109 ...
    • Automated corneal endothelium image segmentation in the presence of cornea guttata via convolutional neural networks - 115110H 

      Sierra Bravo, Juan Sebastián; Pineda, Jesús; Viteri Coronel, Eduardo; Rueda Latorre, Daniela; Tibaduiza Vargas, Beatriz Eugenia; Berrospi, Rubén; Tello, Alejandro; Galvis Ramírez, Virgilio; Volpe, Giovanni; Millán Garcia-Varela, M. Sagrario; Romero Pérez, Lenny Alexandra; Marrugo Hernandez, Andrés Guillermo (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2020)
      Conference report
      Restricted access - publisher's policy
      Automated cell counting in in-vivo specular microscopy images is challenging, especially in situations where single-cell segmentation methods fail due to pathological conditions. This work aims to obtain reliable cell ...
    • 20/21 Central Event in Spain of the International Day of Light: outreach and citizen engagement in time of pandemic 

      Pérez Cabré, Elisabet; Millán Garcia-Varela, M. Sagrario; Armengol Cebrian, Jesús (Optica Publishing Group, 2021)
      Conference report
      Restricted access - publisher's policy
      The 3rd central IDL Event in Spain probably gathered the largest number of activities for the 16th May commemoration in 2021. Conferences, debates, workshops, exhibitions, light shows, and photo contests, adapted to severe ...
    • Visual acuity at various distances and defocus curve: a good match 

      Clavé Cerezo, Laura; Torrents Gómez, Aurora; Millán Garcia-Varela, M. Sagrario (2022-02-01)
      Article
      Open Access
      The defocus curve (DC) has become the gold standard method for assessing the visual performance at different distances, and hence, to evaluate the depth of focus that is provided by modern presbyopia-compensating intraocular ...
    • Impact of lens material on objective refraction in eyes with trifocal diffractive intraocular lenses 

      Garzón Jimenez, Nuria; Poyales, Francisco; García Montero, María; Vega Lerín, Fidel; Millán Garcia-Varela, M. Sagrario; Albarrán Diego, César (2021-01-01)
      Article
      Open Access
      Purpose: Compare subjective (Rx) and objective (ObjRx) refractions outcomes with two autorefractors models and an aberrometer in eyes implanted with a hydrophobic trifocal IOL (FineVision POD F GF, Physiol, Liége, Belgium) ...
    • Detection and removal of dust artifacts in retinal images via sparse-based inpainting 

      Barrios Montes, Erik Miguel; Sierra, E.; Romero Pérez, Lenny Alexandra; Millán Garcia-Varela, M. Sagrario; Marrugo Hernandez, Andrés Guillermo (2021-09)
      Article
      Open Access
      Dust particle artifacts are present in all imaging modalities but have more adverse consequences in medical images like retinal images. They could be mistaken as small lesions, such as microaneurysms. We propose a method ...
    • Correlación y concordancia entre la técnica de retinoscopia de Mohindra y la retinoscopia con ciclopléjico en la infancia 

      Morales Ruiz, Hari; Fernández Agrafojo, Dora; Cardona Torradeflot, Genís (2022-01)
      Article
      Restricted access - publisher's policy
      Antecedentes y objetivo: La retinoscopía, como técnica objetiva de evaluación del estado refractivo, es especialmente útil en la edad infantil. La técnica de Mohindra (RM) es una alternativa para aquellos pacientes en los ...
    • El reto de reemplazar el cristalino 

      Millán Garcia-Varela, M. Sagrario (2021-11-16)
      Article
      Open Access
      La catarata o pérdida de transparencia del cristalino es un trastorno de la visión muy invalidante que ha sufrido la humanidad a lo largo de la historia. En las últimas décadas se trata con éxito mediante la sustitución ...