Now showing items 1-20 of 58

    Meibomian gland dysfunction and dry eye symptoms of fitted and over the counter contact lens wearers compared with non-contact lens wearing controls 

    Ifrah, Reut (Date of defense: 2023-06-26)

    (English) Meibomian gland dysfunction (MGD) is a chronic and diffuse abnormality of the meibomian glands (MGs) that occurs in 38% of contact lens (CL) wearers, though the influence of CLs on MGD is equivocal. A topical ...

    Influencia del comportamiento cromático de las lentes intraoculares en la función visual 

    Clavé Cerezo, Laura (Date of defense: 2023-04-27)

    (English) Diffractive multifocal intraocular lens typically uses a hybrid refractive-diffractive design that consist of a high-power refractive base lens and a low-power diffractive profile engraved on one of its surfaces. ...

    Development and clinical applications of a whole anterior segment and retinal SS-OCT 

    Rodríguez Aramendía, Ana (Date of defense: 2023-03-24)

    (English) Vision is central to human perception. It emanates from a complex organ, the human eye, starting from photodetection in the retina. However, the quality of the visual experience depends on the anatomical integrity ...

    Design and construction of a snapshot full-Stokes polarimetric camera : seeing through fog 

    Peña Gutiérrez, Sara (Date of defense: 2023-02-24)

    (English) Polarization is one of the properties of light and it is often put aside. Human beings receive light beams and process only the intensity and wavelength information. Our optical system lacks the capability of ...

    Estudi i desenvolupament de sensors òptics ultra-ràpids per a metrologia tridimensional de superfícies 

    Martínez Marín, Pol (Date of defense: 2023-02-10)

    (English) Three-dimensional measurement of roughness and shape of a surface provides information about an object properties through surface parameters. These parameters are defined by international standards and can describe ...

    Diseño e implementación de un laboratorio destinado a la validación clinica de ayudas para la percepción y movilidad en pacientes con limitación de campo periférico 

    Sánchez Herrero, Eulalia (Date of defense: 2022-01-21)

    People with peripheral visual field loss perceive limited information about the environment and present severe problems in achieving successful orientation and mobility. In recent years, virtual and augmented reality systems ...

    Caracterización de la regresión diurna en ortoqueratología 

    Pérez Corral, Juan Enrique (Date of defense: 2021-11-09)

    The first papers on the fitting of ortho-k lenses in ametropic individuals, treatment that allows them to enjoy good vision without the need to wear glasses or contact lenses, were published almost 60 years ago. Both the ...

    Spectral control methods and applications for multi-channel LED light engines 

    Llenas Farràs, Aleix (Date of defense: 2019-12-04)

    Lighting installations are usually static and based on long-standing visual indicators such as colour temperature, colour rendering, and illuminance values. However, we now know that spectral variations in light elicit ...

    Hyperspectral imaging system for the fast recording of the ocular fundus 

    Alterini, Tommaso (Date of defense: 2021-06-25)

    Vision loss affects physical, psychological, and emotional wellbeing and social life as well. High life expectancy and health policies are translated into an aging population worldwide, which has higher risk of eye’s ...

    Validación de un instrumento de calidad de vida específico para pacientes con discapacidad visual : Low Vision Quality of Life (LVQOL) 

    Pérez Mañá, Lluis (Date of defense: 2019-10-11)

    There is a growing need in the western world to know the quality of life (QoL) of patients affected by ocular pathologies that cause visual impairment (VI). In this type of pathologies, objective data such as visual acuity ...

    Caracterització dels paràmetres corneals per a l'adaptació de lents de contacte en casos de queratocon 

    Mas Aixalà, Enric (Date of defense: 2019-07-12)

    Introduction: The characterization of the corneal surface and the classification of keratoconus into diverse severity stages is a field of research in constant evolution, not only because of technology advances, but also ...

    Development of new methodologies for the clinical, objective and automated evaluation of visual function based on the analysis of ocular movements : application in visual health 

    Mestre Ferrer, Clara (Date of defense: 2019-05-24)

    Healthy visual function not only relies on good visual acuity. Other systems such as accommodation or binocular vision need to be effective. Binocular vision is the ability of the visual system to coordinate and integrate ...

    Quality check of optical elements manufactured with in-mould hybrid integration technique 

    Castilla González, Pau (Date of defense: 2019-04-05)

    In the present industrial thesis has been developed and implemented with success a measurement strategy that consists of an optical test of validation of the optical functionality of photonic components in the same ...

    Design of a portable observatory control system 

    Suc, Vincent (Date of defense: 2018-11-07)

    In this thesis, we synthesize the development of a new concept of operation of small robotic telescopes operated over the Internet. Our design includes a set of improvements in control algorithmic and hardware of several ...

    Optical and visual characterization of multifocal contact lenses and multifocal intraocular lenses 

    Giner Tort, Anna (Date of defense: 2018-10-08)

    Vision is presented and universally accepted as the most precious of the human senses.lt is structured in three main parts: the optical system {eye), the photo-sensor {eye's retina), and the data processor (brain). If one ...

    Novel system for measuring the scattering of the cornea and the lens 

    Santos Vives, Pau (Date of defense: 2018-07-13)

    Spatial vision features play a key role in human vision quality, which in turn depends on the retinal image quality and posterior neural processing. The retinal image is affected by three optical phenomena: diffraction, ...

    Estudi del parpelleig en usuaris/es de pantalles digitals : anàlisi d'estratègies pel condicionament del parpelleig i la distància de manera no intrusiva 

    Argilés Sans, Marc (Date of defense: 2018-07-09)

    Intoduction: There is an agreement in the scientific community, which indicates that excessive exposure to digital displays poses implications at a visual level, being ocular dryness and visual fatigue those of greater ...

    Implementation of differential self-mixing interferometry systems for the detection of nanometric vibrations 

    Azcona Guerrero, Francisco Javier (Date of defense: 2018-07-20)

    In this Thesis, we explore Self-mixing interferometry (SMI ), a method capable of producing high resolution optical path related measurements in a simple, compact and cost-effective way. Even with a notably less complex ...

    Structural and functional macular inter-ocular asymmetry in patients with high myopia 

    Alzaben, Zeyad A. (Date of defense: 2018-06-25)

    BACKGROUND: Retinal evaluation performed in the optometry clinic allows optometrists to track the prognosis of retinal disease and to assess anatomical and functional changes related to age and pathological and non-pathological ...

    Device and strategy for surface energy measurement 

    Domínguez Álvarez, Noemí (Date of defense: 2018-03-15)

    In this Ph.D. Thesis, we have developed a new measurement method to measure the contact angle and the surface energy in hydrophobic samples with a device based on confocal technology. This new measurement method incorporates ...