Search results for "Optometry"

Prevalence of visual impairment and refractive errors in an urban area of Mexico

2019

AIM: To determine the distribution of refractive errors in a school-age population in Quintana Roo (Mexico) in the framework of an international cooperation campaign for the prevention of blindness. METHODS: A sample of 2647 school-age children (ranging from 5 to 14 years old) with a mean age of 9.1±1.9 years old were tested by trained volunteers for distance visual acuity (VA) and refractive errors. The first screening examination included uncorrected distance visual acuity (UDVA) and VA with a +2.00 D lens. Inclusion criteria for a second complete cycloplegic eye examination performed by an optometrist were UDVA <20/25 (0.10 logMAR or 0.8 decimal) and/or VA with +2.00 D ≥20/25. RESULTS: A…

Eye and cat scratch disease: A case series

2016

Resume Introduction La maladie des griffes du chat est une affection polymorphe, pouvant se manifester par des atteintes ophtalmologiques isolees. Nous rapportons les observations cliniques de sept cas, ayant presente une atteinte ophtalmologique posterieure de la maladie des griffes du chat. Observations Notre population comprenait sept patients, dont cinq femmes, d’âge median de 52 ans, avec une atteinte unilaterale dans trois cas. Une neuroretinite stellaire de Leber etait retrouvee chez six patients, un syndrome incomplet dans deux cas (soit un œdeme papillaire isole, soit un œdeme maculaire trainant) et associe a des foyers chorioretiniens dans un cas. Des foyers retiniens isoles ont e…

Pharmacokinetics of Intravitreal Anti-VEGF Drugs in Age-Related Macular Degeneration

2019

Intravitreal administration of anti-vascular endothelial growth factor (VEGF) antibodies has become the standard treatment for Age-Related Macular Degeneration; however, the knowledge of their pharmacokinetics is limited. A comprehensive review of the preclinical and clinical pharmacokinetic data that were obtained in different studies with intravitreal bevacizumab, ranibizumab, and aflibercept has been conducted. Moreover, the factors that can influence the vitreous pharmacokinetics of these drugs, as well as the methods that were used in the studies for analytical determination, have been exposed. These anti-VEGF drugs present different charge and molecular weights, which play an importan…

Serological Levels of Anti-clathrin Antibodies Are Decreased in Patients With Pseudoexfoliation Glaucoma

2021

Evidence for immunologic contribution to glaucoma pathophysiology is steadily increasing in ophthalmic research. Particularly, an altered abundance of circulating autoantibodies to ocular antigens is frequently observed. Here, we report an analysis of autoantibody abundancies to selected antigens in sera of open-angle glaucoma patients, subdivided into normal-tension glaucoma (N = 31), primary open-angle glaucoma (N = 43) and pseudoexfoliation glaucoma (N = 45), vs. a non-glaucomatous control group (N = 46). Serum samples were analyzed by protein microarray, including 38 antigens. Differences in antibody levels were assessed by ANOVA. Five serological antibodies showed significantly altered…

What is the opinion of the family doctors on the optometry consultations of the Navarre Health Service?

2020

Esta carta crea un precedente en España, ya que por primera vez se muestra la percepción que tienen los médicos de familia sobre las tres consultas de optometría abiertas en el Servicio Navarro de Salud (Osasunbidea), transcurridos 10 años de la creación de la primera de ellas en 2006. Teniendo en cuenta que no todas las comunidades autónomas cuentan con estas consultas implementadas en el sistema sanitario, consideramos que este servicio es fundamental ponerlo en marcha y desarrollarlo en el resto de comunidades, para ofrecer al paciente una mejor atención primaria. Asociación Española de Optometristas Unidos

“SmartGlass” Obstacles for Dynamic Inducing of Light Scattering in Vision Research Experiments

2017

We describe a technique that allows control of visual stimuli quality through the use of a setup with a polymer dispersed liquid crystal (PDLC) film positioned in the optical pathway of one or both human eyes. Nowadays, PDLC films allow alteration of the resolution and contrast limits of the transmitted light due to continuous change in the light scattering that is obtained by the application of an AC electrical field. In our experimental setup, the use of a wide-aperture up to area of 20 x 15 cm2 PDLC sheet is combined with a flat-screen PC display or with a modified display emission block without its interference filter unit and with an installed individually controllable colored light-em…

Retinal Straylight Before and After Penetrating Keratoplasty in an Eye with a Post-Herpetic Corneal Scar

2008

Objetivo: Estudio in vivo de la luz dispersa que alcanza la retina en un paciente antes y despues de someterse a una queratoplastia penetrante (o sus siglas en ingles, PKP). Metodos: En un paciente varon de 65 anos con una ulcera corneal herpetica se midio la proporcion de luz dispersa que alcanza la retina tanto antes como despues de una PKP, utilizando para ello un metodo psicometrico denominado "de comparacion por compensacion" («Compensation comparison method», C-Quant straylightmeter, Oculus GmbH, Alemania). Resultados: La cantidad de luz dispersa que alcanza la retina medida antes de la cirugia fue elevada en comparacion con los valores obtenidos en estudios previos en sujetos normale…

Ocular performance evaluation

2019

Real and virtual three-dimensional (3D) imaging has found useful applications across different areas of health sciences and with the current rapidly progressive development stage we can expect that the use of 3D imaging soon will be a part of a daily visual load for medical personnel. To better understand the possible impact of prolonged work with 3D content on eye accommodative response and pupil size we compared two 3D imaging techniques - volumetric display that is real voxel-based system and anaglyph technique that is virtual pixel-based system. We have investigated accommodative lag and pupil responses in 38 emmetropic young adult after prolonged visual task with volumetric 3D display …

Book Review

2021

Wine Quality Perception: A Sensory Point of View

2016

Wine is a complex product, which had moved from a nutritional food to a hedonic beverage in consumer representation. This fact has increased the demand of quality products in the market. In this context, it is of high interest for wine producers to understand the underlying indicators of consumers’ quality perception as well as the relative importance they attach to these cues when inferring quality in wine to reach the alignment of consumers’ expectations, needs and wants. This chapter is aimed at giving an overview of the current state of knowledge of the indicators of wine quality perception from a sensory point of view. For this purpose, the factors driving perceived quality of wine as …