Search results for "Eye"
showing 10 items of 2511 documents
Expert musical reading is supported by activation of harmony rules during cross-modal integration
2017
International audience; Multisensory integration of musical information is an important process in music reading. Integrate many sensory inputs (visual, auditory, motor) into a coherent pathway emerges during development of musical skill. We hypothesize that more skilled musicians can retrieve information across auditory and visual modalities, activating harmony rules as retrieval cues. The aim of the present research is to investigate this issue using the eye-tracking technique. Musicians (experts and non-experts) were asked to detect as fast as possible a modified note between listening and reading phases. Randomized fragments of classical music were sequentially versus simultaneously dis…
Protective Effects of L- and D-Carnosine on R-Crystallin Amyloid Fibril Formation: Implications for Cataract Disease
2009
Mildly denaturing conditions induce bovine ?-crystallin, the major structural lens protein, to self-assemble into fibrillar structures in vitro. The natural dipeptide L-carnosine has been shown to have potential protective and therapeutic significance in many diseases. Carnosine derivatives have been proposed as potent agents for ophthalmic therapies of senile cataracts and diabetic ocular complications. Here we report the inhibitory effect induced by the peptide (L- and D-enantiomeric form) on ?-crystallin fibrillation and the almost complete restoration of the chaperone activity lost after denaturant and/or heat stress. Scanning force microscopy (SFM), thioflavin T, and a turbidimetry ass…
Crystalline subtype of pre-descemetic corneal dystrophy.
2014
Purpose: To report corneal findings in a familial case of the crystalline subtype of pre- Descemetic corneal dystrophy. Case Report: A 19-year-old girl and her 44-year-old mother were found to have asymptomatic, bilateral, punctiform and multi-colored crystalline opacities across the whole posterior layer of the corneas. Endothelial specular microscopy revealed the presence of white round flecks located at different levels anterior to the endothelium. No systemic abnormalities or medications could be related to account for these findings. Conclusion: To the best of our knowledge, this is the third familial report of this rare corneal disorder. Differential diagnosis may include Schnyder cor…
Scanning and deep processing of information in hypertext: an eye tracking and cued retrospective think-aloud study
2016
When students solve problems on the Internet, they have to find a balance between quickly scanning large sections of information in web pages and deeply processing those that are relevant for the task. We studied how high school students articulate scanning and deeper processing of information while answering questions using a Wikipedia document, and how their reading comprehension skills and the question type interact with these processes. By analyzing retrospective think-aloud protocols and eye-tracking measures, we found that scanning of information led to poor hypertext comprehension, while deep processing of information produced better performance, especially in location questions. Thi…
Alternative Strategies in Processing 3D Objects Diagrams: Static, Animated and Interactive Presentation of a Mental Rotation Test in an Eye Movements…
2014
Spatial abilities involved in reasoning with diagrams have been assessed using tests supposed to require mental rotation (cube figures of the Vandenberg & Kruse). However, Hegarty (2010) described alternative strategies: Mental rotation is not always used; analytical strategies can be used instead. In this study, we compared three groups of participants in three external formats of presentation of the referent figure in the Vandenberg & Kruse test: static, animated, interactive. During the test, participants were eye tracked. After the test, they were interrogated on their strategies for each item during the viewing of the replay of their own eye movement in a cued retrospective verbal prot…
Cueing complex animations: Does direction of attention foster learning processes?
2011
Abstract The time course of learners’ processing of a complex animation was studied using a dynamic diagram of a piano mechanism. Over successive repetitions of the material, two forms of cueing (standard colour cueing and anti-cueing) were administered either before or during the animated segment of the presentation. An uncued group and two other control conditions were also employed. Development of an internal representation of the movements depicted in the animation was evaluated through participant demonstrations of the mechanism’s operation on a replica piano mechanism. Eye tracking (fixation lengths) indicated that overall, conventional visuospatially-based cueing was largely ineffect…
First record of Tamarix meyeri (Tamaricaceae) for western Europe
2012
Abstract Field investigations and herbaria reference work carried out in Italy and Spain allowed us to identify wild and cultivated plants of Tamarix meyeri, a new species from western Europe. This small tree is characterized by tetramerous, rarely pentamerous flowers and a paralophic disk.
Visual Attention in Virtual Reality Settings: An Abstract
2019
Virtual reality, VR, is challenging marketers to understand both brand interaction and the customer experience at the point of sale. In order to test the usefulness of VR in retailing, research must address how the customer’s visual attention in a VR setting affects his/her behavior. There are two main drivers for this research. First, there has been an enormous growth in recent years in the use of neurophysiological methods to measure visual attention. At the store level, previous works show that attention to products measured through eye tracking influences consumer decision. Second, VR is being increasingly adopted by brands, but research is lacking into comparisons between VR formats. W…
Changes in physiological astigmatism of human eye during accommodation in emmetropes (Conference Presentation)
2017
Introduction: Most young emmetrope eyes are far from ideal and have some degree of minor spherocylindrical error including also physiological astigmatism. Because of the changes in the shape of optical interfaces, pupil size, eyelid pressure, tear film, body posture, binocularity and accommodation astigmatism is considered as constantly dynamic phenomenon (Cheng et al, 2004). The purpose of this study was to evaluate and quantify changes in physiological astigmatism during accommodation. Method: Twenty young emmetropes with mean age 24 ± 4 years were selected for the study. Refraction and accommodative response were measured monocularly for dominant eye with an open-field infrared autorefract…
Implementación de un display 3D basado en imagen integral
2018
Desde hace varios años, el desarrollo y la evolución de tecnologías capaces de registrar y/o reconstruir información 3D está en auge, principalmente debido al gran interés que despierta este campo de estudio. Entre estas tecnologías, destaca la técnica de Imagen Integral, debido principalmente a su capacidad de generar un imagen 3D que proporciona al sistema visual una respuesta similar a la que obtendría percibiendo un objeto 3D real. Aunque esta técnica no está exenta de limitaciones, se están realizando prometedores avances para resolver sus principales inconvenientes. En esta Tesis se estudia la técnica de imagen integral con el objetivo de implementar un monitor 3D que sir…