Universitat Politècnica de Catalunya
Now showing items 1-20 of 26
This dissertation deals with the evaluation of ocular optical quality in two types of patients. First, are patients who have undergone different surgical techniques of refractive surgery to correct different degrees of ...
PURPOSE: This thesis presents the results of a prospective, double-blind and randomized clinical trial conducted at the Hospital de Sant Pau i la Santa Creu ofBarcelona.lts main objective was to assess and compare visual ...
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 ...
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 ...
The optical characterization of an intraocular lens (IOL) provides objective and quantitative information that is essential to fully understand its performance as an implant that replaces the crystalline lens in the human ...
Medical digital imaging has become a key element of modern health care procedures. It provides a visual documentation, a permanent record for the patients, and most importantly the ability to extract information about many ...
(English) Introduction: Non-compliance in the use and care of contact lenses (CLs) and their accessories is a major clinical problem, and although there have been notable scientific advances in the designs and materials ...
(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 ...
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 ...
Myopia is the main cause of vision loss worlwide, with associated ocular pathology risks related to myopia amount. Therefore, interventions directed towards limiting or preventing the progression of myopia are of high ...
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 ...
Stent quality control is a critical process. Coronary stents have to be inspected 100% so no defective stent is implanted into a human body. We have developed an optical non-contact measurement instrument that provides ...
(English) Neurofibromatoses (NF) are a group of three related but genetically distinct disorders of the nervous system that cause tumors to grow around nerves. The tumors originate in the cells that make up the myelin ...
(English) An intraocular lens (IOL) is an implant that is used in cataract surgery to replace the clouded natural lens (cataract) and restore the loss of transparency. Currently, there is a wide variety of designs, brands, ...
Las hemianopsias homónimas se pueden definir como la pérdida absoluta o parcial de la visión en las mitades derechas o izquierdas de los campos visuales de ambos ojos. Los pacientes que sufren un defecto hemianópsico ...
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 ...
(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. ...
A visual stimulus can be presented in free space or through lens-based systems. Interestingly, it has been reported many times in the past that some subjects have poorer accommodative responses when optically stimulated, ...
(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 ...
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, ...
