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https://www.readbyqxmd.com/read/28942369/slanted-support-window-based-stereo-matching-for-surface-reconstruction-of-microscopic-samples
#1
Ahmadreza Baghaie, Chi Zhang, Ali Bakhshinejad, Heather A Owen, Hongyang Chao, Roshan M D'Souza, Zeyun Yu
This work is to address the limitations of 2D Scanning Electron Microscopy (SEM) micrographs in providing 3D topographical information necessary for various types of analysis in biological and biomedical sciences as well as mechanical and material engineering by investigating modern stereo vision methodologies for 3D surface reconstruction of microscopic samples. To achieve this, micrograph pairs of the microscopic samples are acquired by utilizing an SEM equipped with motor controlled specimen stage capable of precise translational, rotational movements and tilting of the specimen stage...
September 8, 2017: Micron: the International Research and Review Journal for Microscopy
https://www.readbyqxmd.com/read/28882501/overview-of-reading-development-and-assessments-for-the-pediatric-ophthalmologist
#2
REVIEW
Megan E Collins, Lucy I Mudie, Amanda J Inns, Michael X Repka
Reading difficulties are common in the pediatric population, and large socioeconomic disparities exist. In the United States 46% of white children achieved expected reading proficiency by the end of fourth grade, while only 21% of Hispanic and 18% of African American children were reading at the expected level. Reading is an involved cognitive process with many subskills; likewise, development of reading proficiency is a complex and continuous process. Failure to achieve reading proficiency or even early difficulty with reading can affect a child's academic performance for years to come...
September 4, 2017: Journal of AAPOS: the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/28876308/the-need-to-promote-sexual-health-in-america-a-new-vision-for-public-health-action
#3
Jessie V Ford, Megan B Ivankovich, John M Douglas, Edward W Hook, Lynn Barclay, Joycelyn Elders, David Satcher, Eli Coleman
Sexual health is considered to be a state of wellness with physical, emotional, mental, and social dimensions. Sexual health can contribute to our overall well-being in each of these dimensions. However, despite the intrinsic importance and positive aspects of sexuality in our lives, the United States presently faces significant challenges related to the sexual health of its citizens, including human immunodeficiency virus, other sexually transmitted infections, viral hepatitis, unintended pregnancies, sexual violence, sexual dysfunction, and cancers in reproductive tracts with serious disparities among the populations affected...
June 28, 2017: Sexually Transmitted Diseases
https://www.readbyqxmd.com/read/28858046/the-charles-f-prentice-award-lecture-2015-neural-organization-of-binocular-vision
#4
Ralph D Freeman
During a Research Career Development Award from the National Eye Institute, I spent a year at the University of Cambridge doing research with John Robson. The goal was to use a visual stimulation approach that had not been previously attempted, with the intention of exploring fundamental organization principles of the neural basis of binocular vision. The idea was to use sinusoidal gratings that drifted before both eyes such that the relative phase for one eye was fixed while that of the other was varied. This provided binocular stimuli of variable relative phase, i...
August 25, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28836389/optimal-orientation-for-angularly-segmented-multifocal-corrections
#5
Pablo de Gracia, Andreas Hartwig
PURPOSE: Evaluate the importance of orientation of multifocal lens designs with angular increments of addition. METHODS: Optical properties of one monofocal and three multifocal designs were analysed with the visual Strehl ratio (VSOTF) metric through-focus (-1 to 5 D). Designs were tested in combination with the higher-order aberrations (HOAs) of 782 subjects (1564 eyes). Simulations included one monofocal, one bifocal (eight orientations), one trifocal (four orientations), and a 4-foci design (four orientations)...
September 2017: Ophthalmic & Physiological Optics: the Journal of the British College of Ophthalmic Opticians (Optometrists)
https://www.readbyqxmd.com/read/28768112/the-disparate-histories-of-binocular-vision-and-binaural-hearing
#6
Nicholas J Wade
Vision and hearing are dependent on disparities of spatial patterns received by two eyes and on time and intensity differences to two ears. However, the experiences of a single world have masked attention to these disparities. While eyes and ears are paired, there has not been parity in the attention directed to their functioning. Phenomena involving binocular vision were commented upon since antiquity whereas those about binaural hearing are much more recent. This history is compared with respect to the experimental manipulations of dichoptic and dichotic stimuli and the instruments used to stimulate the paired organs...
August 2, 2017: Journal of the History of the Neurosciences
https://www.readbyqxmd.com/read/28746813/binocular-mechanisms-of-3d-motion-processing
#7
Lawrence K Cormack, Thaddeus B Czuba, Jonas Knöll, Alexander C Huk
The visual system must recover important properties of the external environment if its host is to survive. Because the retinae are effectively two-dimensional but the world is three-dimensional (3D), the patterns of stimulation both within and across the eyes must be used to infer the distal stimulus-the environment-in all three dimensions. Moreover, animals and elements in the environment move, which means the input contains rich temporal information. Here, in addition to reviewing the literature, we discuss how and why prior work has focused on purported isolated systems (e...
September 15, 2017: Annual Review of Vision Science
https://www.readbyqxmd.com/read/28718747/the-role-of-temporal-disparity-on-audiovisual-integration-in-low-vision-individuals
#8
Stefano Targher, Rocco Micciolo, Valeria Occelli, Massimiliano Zampini
Recent findings have shown that sounds improve visual detection in low vision individuals when the audiovisual stimuli pairs of stimuli are presented simultaneously and from the same spatial position. The present study purports to investigate the temporal aspects of the audiovisual enhancement effect previously reported. Low vision participants were asked to detect the presence of a visual stimulus (yes/no task) presented either alone or together with an auditory stimulus at different stimulus onset asynchronies (SOAs)...
January 1, 2017: Perception
https://www.readbyqxmd.com/read/28700811/probing-for-congenital-nasolacrimal-duct-obstruction
#9
REVIEW
Carisa Petris, Don Liu
BACKGROUND: Congenital nasolacrimal duct obstruction (NLDO) is a common condition causing excessive tearing in the first year of life. Infants present with excessive tearing or mucoid discharge from the eyes due to blockage of the nasolacrimal duct system, which can result in maceration of the skin of the eyelids and local infections, such as conjunctivitis, that may require antibiotics. The incidence of nasolacrimal duct obstruction in early childhood ranges from 5% to 20% and often resolves without surgery...
July 12, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28671146/repetitive-dynamic-stereo-test-improved-processing-time-in-young-athletes
#10
Micha Daniel Schoemann, Matthias Lochmann, Jan Paulus, Georg Michelson
BACKGROUND: Current studies revealed the importance of perceptual training for the treatment of amblyopia. To improve stereo vision on a higher level, visual tasks have to be completed within a limited time window like in repetitive visual function tests. "Processing time" as the reaction time in which the absence or presence of depth was identified correctly, is of better predictive value for perceiving the depth than the stereo threshold only. OBJECTIVE: To examine the long-term effects of repetitive dynamic testing of stereopsis on processing time...
2017: Restorative Neurology and Neuroscience
https://www.readbyqxmd.com/read/28656672/drilling-into-the-functional-significance-of-stereopsis-the-impact-of-stereoscopic-information-on-surgical-performance
#11
Loulwa M Al-Saud, Faisal Mushtaq, Isra'a Mirghani, Ahmed Balkhoyor, Andrew Keeling, Michael Manogue, Mark A Mon-Williams
PURPOSE: One suggested advantage of human binocular vision is the facilitation of sophisticated motor control behaviours via stereopsis - but little empirical evidence exists to support this suggestion. We examined the functional significance of stereopsis by exploring whether stereopsis is used to perform a highly skilled real-world motor task essential for the occupational practice of dentistry. METHODS: We used a high fidelity virtual reality simulator to study how dentists' performance is affected by the removal of horizontal retinal image disparities under direct and indirect (mirror) observation...
July 2017: Ophthalmic & Physiological Optics: the Journal of the British College of Ophthalmic Opticians (Optometrists)
https://www.readbyqxmd.com/read/28647543/healthy-eating-and-activity-across-the-lifespan-heal-a-call-to-action-to-integrate-research-clinical-practice-policy-and-community-resources-to-address-weight-related-health-disparities
#12
Jerica M Berge, Margaret Adamek, Caitlin Caspi, Katie A Loth, Amy Shanafelt, Steven D Stovitz, Amanda Trofholz, Katherine Y Grannon, Marilyn S Nanney
Despite intense nationwide efforts to improve healthy eating and physical activity across the lifespan, progress has plateaued. Moreover, health inequities remain. Frameworks that integrate research, clinical practice, policy, and community resources to address weight-related behaviors are needed. Implementation and evaluation of integration efforts also remain a challenge. The purpose of this paper is to: (1) Describe the planning and development process of an integrator entity, HEAL (Healthy Eating and Activity across the Lifespan); (2) present outcomes of the HEAL development process including the HEAL vision, mission, and values statements; (3) define the planned integrator functions of HEAL; and (4) describe the ongoing evaluation of the integration process...
August 2017: Preventive Medicine
https://www.readbyqxmd.com/read/28640235/stereo-vision-based-high-dynamic-range-imaging-using-differently-exposed-image-pair
#13
Won-Jae Park, Seo-Won Ji, Seok-Jae Kang, Seung-Won Jung, Sung-Jea Ko
In this paper, a high dynamic range (HDR) imaging method based on the stereo vision system is presented. The proposed method uses differently exposed low dynamic range (LDR) images captured from a stereo camera. The stereo LDR images are first converted to initial stereo HDR images using the inverse camera response function estimated from the LDR images. However, due to the limited dynamic range of the stereo LDR camera, the radiance values in under/over-exposed regions of the initial main-view (MV) HDR image can be lost...
June 22, 2017: Sensors
https://www.readbyqxmd.com/read/28637820/dynamic-mechanisms-of-visually-guided-3d-motion-tracking
#14
Kathryn Bonnen, Alexander C Huk, Lawrence K Cormack
The continuous perception of motion-through-depth is critical for both navigation and interacting with objects in a dynamic three-dimensional (3D) world. Here we used 3D tracking to simultaneously assess the perception of motion in all directions, facilitating comparisons of responses to motion-through-depth to frontoparallel motion. Observers manually tracked a stereoscopic target as it moved in a 3D Brownian random walk. We found that continuous tracking of motion-through-depth was selectively impaired, showing different spatiotemporal properties compared with frontoparallel motion tracking...
September 1, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28624755/stereo-vision-based-tracking-of-soft-tissue-motion-with-application-to-online-ablation-control-in-laser-microsurgery
#15
Andreas Schoob, Dennis Kundrat, Lüder A Kahrs, Tobias Ortmaier
Recent research has revealed that image-based methods can enhance accuracy and safety in laser microsurgery. In this study, non-rigid tracking using surgical stereo imaging and its application to laser ablation is discussed. A recently developed motion estimation framework based on piecewise affine deformation modeling is extended by a mesh refinement step and considering texture information. This compensates for tracking inaccuracies potentially caused by inconsistent feature matches or drift. To facilitate online application of the method, computational load is reduced by concurrent processing and affine-invariant fusion of tracking and refinement results...
June 8, 2017: Medical Image Analysis
https://www.readbyqxmd.com/read/28622408/creation-of-the-quebrada-arriba-community-and-academic-partnership-an-effective-coalition-for-addressing-health-disparities-in-older-puerto-ricans
#16
Elsa M Orellano-Colón, Yolanda González-Laboy, Amarelis De Jesús-Rosario
OBJECTIVE: The objective of this project was to develop a community-academic coalition partnership to conduct community-based participatory research (CBPR) to address health disparities in older adults with chronic conditions living in the Quebrada Arriba community. METHODS: We used the 'Developing and Sustaining CPPR Partnerships: A Skill-Building Curriculum', to create the Quebrada Arriba Community-Academic Partnership (QACAP). We assessed the meetings effectiveness and the CBPR experiences of the coalition members in the community-academic partnership...
June 2017: Puerto Rico Health Sciences Journal
https://www.readbyqxmd.com/read/28611463/dressmakers-show-enhanced-stereoscopic-vision
#17
Adrien Chopin, Dennis M Levi, Daphné Bavelier
The ability to estimate the distance of objects from one's self and from each other is fundamental to a variety of behaviours from grasping objects to navigating. The main cue to distance, stereopsis, relies on the slight offsets between the images derived from our left and right eyes, also termed disparities. Here we ask whether the precision of stereopsis varies with professional experience with precise manual tasks. We measured stereo-acuities of dressmakers and non-dressmakers for both absolute and relative disparities...
June 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28605644/gender-differences-in-positive-life-orientation-among-the-nursing-home-elders-in-china-a-cross-sectional-study
#18
Cheng Jin, Zhibo Zheng, Wei Xian, Ming Bai, Liying Jin, Yuting Li, Xiufei Yang, Yang Sheng, Wensi Ai, Hongbo Liu
INTRODUCTION: Life orientation among the nursing home elders would differ from those of community-dwelling elders due to the different living environment, but may have greater differences in gender. OBJECTIVES: This study was designed to investigate the positive life orientation and explore the potential risk factors including gender disparities among nursing home elders in China. METHODS: This cross-sectional study was conducted in Northeast China...
September 2017: Archives of Gerontology and Geriatrics
https://www.readbyqxmd.com/read/28603771/magnitude-precision-and-realism-of-depth-perception-in-stereoscopic-vision
#19
Paul B Hibbard, Alice E Haines, Rebecca L Hornsey
Our perception of depth is substantially enhanced by the fact that we have binocular vision. This provides us with more precise and accurate estimates of depth and an improved qualitative appreciation of the three-dimensional (3D) shapes and positions of objects. We assessed the link between these quantitative and qualitative aspects of 3D vision. Specifically, we wished to determine whether the realism of apparent depth from binocular cues is associated with the magnitude or precision of perceived depth and the degree of binocular fusion...
2017: Cognitive Research: Principles and Implications
https://www.readbyqxmd.com/read/28585793/prevalence-and-factors-associated-with-second-eye-cataract-surgery-and-the-trend-in-the-time-interval-between-the-two-eye-surgeries-based-on-the-malaysian-national-eye-database
#20
Shu Fen Ho, Tassha Hilda Bin Adnan, Pik Pin Goh
PURPOSE: To study the prevalence of second eye cataract surgery (SECS), trend in time interval between subsequent surgeries over the years, and factors associated with SECS utilization among patients who underwent cataract surgeries in the Ministry of Health (MOH), Malaysia. DESIGN: Secondary cross-sectional analysis of the Malaysian National Eye Database (NED) data. METHODS: The Malaysian Cataract Surgery Registry collected data on patients who had cataract surgery from 2002-2004 and 2007-2012...
July 2017: Asia-Pacific Journal of Ophthalmology
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