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https://www.readbyqxmd.com/read/28531141/eyes-of-things
#1
Oscar Deniz, Noelia Vallez, Jose L Espinosa-Aranda, Jose M Rico-Saavedra, Javier Parra-Patino, Gloria Bueno, David Moloney, Alireza Dehghani, Aubrey Dunne, Alain Pagani, Stephan Krauss, Ruben Reiser, Martin Waeny, Matteo Sorci, Tim Llewellynn, Christian Fedorczak, Thierry Larmoire, Marco Herbst, Andre Seirafi, Kasra Seirafi
Embedded systems control and monitor a great deal of our reality. While some "classic" features are intrinsically necessary, such as low power consumption, rugged operating ranges, fast response and low cost, these systems have evolved in the last few years to emphasize connectivity functions, thus contributing to the Internet of Things paradigm. A myriad of sensing/computing devices are being attached to everyday objects, each able to send and receive data and to act as a unique node in the Internet. Apart from the obvious necessity to process at least some data at the edge (to increase security and reduce power consumption and latency), a major breakthrough will arguably come when such devices are endowed with some level of autonomous "intelligence"...
May 21, 2017: Sensors
https://www.readbyqxmd.com/read/28530228/generic-decoding-of-seen-and-imagined-objects-using-hierarchical-visual-features
#2
Tomoyasu Horikawa, Yukiyasu Kamitani
Object recognition is a key function in both human and machine vision. While brain decoding of seen and imagined objects has been achieved, the prediction is limited to training examples. We present a decoding approach for arbitrary objects using the machine vision principle that an object category is represented by a set of features rendered invariant through hierarchical processing. We show that visual features, including those derived from a deep convolutional neural network, can be predicted from fMRI patterns, and that greater accuracy is achieved for low-/high-level features with lower-/higher-level visual areas, respectively...
May 22, 2017: Nature Communications
https://www.readbyqxmd.com/read/28527174/cerebral-venous-sinus-thrombosis-and-posterior-reversible-encephalopathy-syndrome-coexisting-in-a-woman-a-rare-coincidence
#3
Surekha Dabla, Himanshu Juneja, Anubha Garg, Renu Bansal, Surender Kumar
Cerebral venous sinus thrombosis (CVST) and posterior reversible encephalopathy syndrome (PRES) are two rare diseases which may present with similar symptoms and signs. We report a case with coexisting PRES and CVST in a 34 years old postpartum female presented with multiple episodes of generalized seizures and bilateral vision loss after delivery. MRI brain and venography revealed left transverse sinus, sigmoid sinus and internal cerebral vein thrombosis with vasogenic edema in bilateral parieto-occipital, right temporal and left frontal area, which was suggestive of posterior reversible encephalopathy syndrome (PRES)...
April 2017: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/28526489/intravitreous-injection-of-aav2-sflt01-in-patients-with-advanced-neovascular-age-related-macular-degeneration-a-phase-1-open-label-trial
#4
Jeffrey S Heier, Saleema Kherani, Shilpa Desai, Pravin Dugel, Shalesh Kaushal, Seng H Cheng, Cheryl Delacono, Annie Purvis, Susan Richards, Annaig Le-Halpere, John Connelly, Samuel C Wadsworth, Rafael Varona, Ronald Buggage, Abraham Scaria, Peter A Campochiaro
BACKGROUND: Long-term intraocular injections of vascular endothelial growth factor (VEGF)-neutralising proteins can preserve central vision in many patients with neovascular age-related macular degeneration. We tested the safety and tolerability of a single intravitreous injection of an AAV2 vector expressing the VEGF-neutralising protein sFLT01 in patients with advanced neovascular age-related macular degeneration. METHODS: This was a phase 1, open-label, dose-escalating study done at four outpatient retina clinics in the USA...
May 16, 2017: Lancet
https://www.readbyqxmd.com/read/28524726/objectively-measured-physical-activity-in-brazilians-with-visual-impairment-description-and-associated-factors
#5
Rafael Barbosa Porcellis da Silva, Alexandre Carriconde Marques, Felipe Fossati Reichert
BACKGROUND: Low level of physical activity is a serious health issue in individuals with visual impairment. Few studies have objectively measured physical activity in this population group, particularly outside high-income countries. The aim of this study was to describe physical activity measured by accelerometry and its associated factors in Brazilian adults with visual impairment. METHODS: In a cross-sectional design, 90 adults (18-95 years old) answered a questionnaire and wore an accelerometer for at least 3 days (including one weekend day) to measure physical activity (min/day)...
May 19, 2017: Disability and Rehabilitation
https://www.readbyqxmd.com/read/28516509/the-incidence-and-predictors-of-depressive-and-anxiety-symptoms-in-older-adults-with-vision-impairment-a-longitudinal-prospective-cohort-study
#6
Thomas J Heesterbeek, Hilde P A van der Aa, Ger H M B van Rens, Johannes W R Twisk, Ruth M A van Nispen
PURPOSE: Depression and anxiety are highly prevalent in older adults with vision impairment. Because symptoms of depression and anxiety appear to fluctuate, it is important to identify patients who are at risk of developing these symptoms for early diagnosis and treatment. Therefore, the aim of this study was to determine the incidence of subthreshold depression and anxiety, and to investigate predictors of developing symptoms of depression and anxiety in older adults with vision impairment who had no subthreshold depression or anxiety at baseline...
May 18, 2017: Ophthalmic & Physiological Optics: the Journal of the British College of Ophthalmic Opticians (Optometrists)
https://www.readbyqxmd.com/read/28516471/topical-non-steroidal-anti-inflammatory-drugs-for-analgesia-in-traumatic-corneal-abrasions
#7
REVIEW
Abel Wakai, John G Lawrenson, Annali L Lawrenson, Yongjun Wang, Michael D Brown, Michael Quirke, Omar Ghandour, Ryan McCormick, Cathal D Walsh, Ahmed Amayem, Eddy Lang, Nick Harrison
BACKGROUND: Traumatic corneal abrasions are relatively common and there is a lack of consensus about analgesia in their management. It is therefore important to document the clinical efficacy and safety profile of topical ophthalmic non-steroidal anti-inflammatory drugs (NSAIDs) in the management of traumatic corneal abrasions. OBJECTIVES: To identify and evaluate all randomised controlled trials (RCTs) comparing the use of topical NSAIDs with placebo or any alternative analgesic interventions in adults with traumatic corneal abrasions (including corneal abrasions arising from foreign body removal), to reduce pain, and its effects on healing time...
May 18, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28514944/short-term-visual-outcomes-of-a-new-trifocal-intraocular-lens
#8
Jorge L García-Pérez, Juan Gros-Otero, Celia Sánchez-Ramos, Vanesa Blázquez, Inés Contreras
BACKGROUND: Today, patients often expect to achieve spectacle independance after cataract surgery. New trifocal intraocular lenses have been developed to try and fullfill this demand. The purpose of this study is to report the short-term visual outcomes of a new trifocal intraocular lens (AcrySof PanOptix™). METHODS: Consecutive adult patients undergoing cataract surgery with bilateral implantation of the study intraocular lens in a private practice clinic were considered for inclusion...
May 17, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28511578/retinal-atrophy-in-relation-to-visual-functioning-and-vision-related-quality-of-life-in-patients-with-multiple-sclerosis
#9
Lisanne J Balk, Danko Coric, Jenny A Nij Bijvank, Joep Killestein, Bernard Mj Uitdehaag, Axel Petzold
BACKGROUND: Inner retinal layer atrophy in patients with multiple sclerosis (MS) has been validated as a structural imaging biomarker for neurodegeneration. OBJECTIVE: To determine how retinal layer thickness relates to high-contrast visual acuity (HCVA), low-contrast visual acuity (LCVA) and vision-related quality of life (QoL) and to investigate the effect of previous episodes on MS-associated optic neuritis (MSON). METHODS: Spectral-domain optical coherence tomography (SD-OCT) was performed in 267 patients with MS...
May 1, 2017: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/28510625/rethinking-ada-signage-standards-for-low-vision-accessibility
#10
Aries Arditi
Americans With Disabilities Act (ADA) and International Code Council (ICC) standards for accessible buildings and facilities affect design and construction of all new and renovated buildings throughout the United States, and form the basis for compliance with the ADA. While these standards may result in acceptable accessibility for people who are fully blind, they fall far short of what they could and should accomplish for those with low vision. In this article I critique the standards, detailing their lack of evidence base and other shortcomings...
May 1, 2017: Journal of Vision
https://www.readbyqxmd.com/read/28508345/deep-monocular-3d-reconstruction-for-assisted-navigation-in-bronchoscopy
#11
Marco Visentini-Scarzanella, Takamasa Sugiura, Toshimitsu Kaneko, Shinichiro Koto
PURPOSE: In bronchoschopy, computer vision systems for navigation assistance are an attractive low-cost solution to guide the endoscopist to target peripheral lesions for biopsy and histological analysis. We propose a decoupled deep learning architecture that projects input frames onto the domain of CT renderings, thus allowing offline training from patient-specific CT data. METHODS: A fully convolutional network architecture is implemented on GPU and tested on a phantom dataset involving 32 video sequences and [Formula: see text]60k frames with aligned ground truth and renderings, which is made available as the first public dataset for bronchoscopy navigation...
May 15, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28505034/pediatric-corneal-transplants
#12
Danielle Trief, Maria C Marquezan, Christopher J Rapuano, Christina R Prescott
PURPOSE OF REVIEW: Pediatric keratoplasty poses unique challenges in clinical and surgical management. However, successful transplantation can afford a child vision in an otherwise poorly seeing eye. This review will provide an update on recent advances in pediatric keratoplasty. RECENT FINDINGS: Although children who receive corneal transplants remain at increased risk of rejection, infection, and graft dehiscence compared with adult corneal transplant recipients, new surgical techniques, and advances in clinical management have led to better outcomes...
May 12, 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28504938/perceptual-real-time-2d-to-3d-conversion-using-cue-fusion
#13
Thomas Leimkuehler, Petr Kellnhofer, Tobias Ritschel, Karol Myszkowski, Hans-Peter Seidel
We propose a system to infer binocular disparity from a monocular video stream in real-time. Different from classic reconstruction of physical depth in computer vision, we compute perceptually plausible disparity, that is numerically inaccurate, but results in a very similar overall depth impression with plausible overall layout, sharp edges, fine details and agreement between luminance and disparity. We use several simple monocular cues to estimate disparity maps and confidence maps of low spatial and temporal resolution in real-time...
May 11, 2017: IEEE Transactions on Visualization and Computer Graphics
https://www.readbyqxmd.com/read/28498650/medicare-beneficiaries-high-out-of-pocket-costs-cost-burdens-by-income-and-health-status
#14
Cathy Schoen, Karen Davis, Amber Willink
ISSUE: Fifty-six million people--17 percent of the U.S. population--rely on Medicare. Yet, its benefits exclude dental, vision, hearing, and long-term services, and it contains no ceiling on out-of-pocket costs for covered services, exposing beneficiaries to high costs. GOAL: To inform discussion of possible changes to Medicare, this issue brief looks at beneficiaries’ out-of-pocket costs by income and health status. METHODS: Spending estimates based on the Medicare Current Beneficiary Survey. FINDINGS AND CONCLUSION: More than one-fourth of all Medicare beneficiaries--15 million people--spend 20 percent or more of their incomes on premiums plus medical care, including cost-sharing and uncovered services...
May 2017: Issue Brief of the Commonwealth Fund
https://www.readbyqxmd.com/read/28497480/effectiveness-of-portable-electronic-and-optical-magnifiers-for-near-vision-activities-in-low-vision-a-randomised-crossover-trial
#15
John J Taylor, Rachel Bambrick, Andrew Brand, Nathan Bray, Michelle Dutton, Robert A Harper, Zoe Hoare, Barbara Ryan, Rhiannon T Edwards, Heather Waterman, Christine Dickinson
PURPOSE: To compare the performance of near vision activities using additional portable electronic vision enhancement systems (p-EVES), to using optical magnifiers alone, by individuals with visual impairment. METHODS: A total of 100 experienced optical aid users were recruited from low vision clinics at Manchester Royal Eye Hospital, Manchester, UK, to a prospective two-arm cross-over randomised controlled trial. Reading, performance of near vision activities, and device usage were evaluated at baseline; and at the end of each study arm (Intervention A: existing optical aids plus p-EVES; Intervention B: optical aids only) which was after 2 and 4 months...
May 12, 2017: Ophthalmic & Physiological Optics: the Journal of the British College of Ophthalmic Opticians (Optometrists)
https://www.readbyqxmd.com/read/28492869/effects-of-magnification-on-emotion-perception-in-patients-with-age-related-macular-degeneration
#16
Aaron P Johnson, Heather Woods-Fry, Walter Wittich
Purpose: Individuals with low vision often experience difficulties in performing tasks of daily living, such as face perception. This leads them to having difficulties with social interactions, as they can no longer correctly perceive the emotion of others. The present study investigated the effects of magnification on face perception in participants with age-related macular degeneration (AMD), and their ability to detect and categorize emotions. It was hypothesized that patients with AMD would be less accurate in comparison to healthy controls, but that magnification would improve their performance to that of controls...
May 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28492481/a-vision-aided-3d-path-teaching-method-before-narrow-butt-joint-welding
#17
Jinle Zeng, Baohua Chang, Dong Du, Guodong Peng, Shuhe Chang, Yuxiang Hong, Li Wang, Jiguo Shan
For better welding quality, accurate path teaching for actuators must be achieved before welding. Due to machining errors, assembly errors, deformations, etc., the actual groove position may be different from the predetermined path. Therefore, it is significant to recognize the actual groove position using machine vision methods and perform an accurate path teaching process. However, during the teaching process of a narrow butt joint, the existing machine vision methods may fail because of poor adaptability, low resolution, and lack of 3D information...
May 11, 2017: Sensors
https://www.readbyqxmd.com/read/28488860/flexible-and-highly-photosensitive-electrolyte-gated-organic-transistors-with-ionogel-silver-nanowire-membranes
#18
Haihua Xu, Qingqing Zhu, Ying Lv, Kan Deng, Yinghua Deng, Qiaoliang Li, Suwen Qi, Wenwen Chen, Huisheng Zhang
Flexible and low-voltage photosensors with high near-infrared (NIR) sensitivity are critical for the realization of interacting humans with robots and environments by thermal imaging or night vision techniques. In this work, we for the first time develop an easy and cost-effective process to fabricate flexible and ultra-thin electrolyte-gated organic phototransistors (EGOPTs) with high transparent nanocomposite membranes involved of high-conductivity silver nanowire (AgNW) networks and large-capacitance iontronic films...
May 10, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28486967/pseudoxanthoma-elasticum
#19
REVIEW
Dominique P Germain
Pseudoxanthoma elasticum (PXE) is a genetic metabolic disease with autosomal recessive inheritance caused by mutations in the ABCC6 gene. The lack of functional ABCC6 protein leads to ectopic mineralization that is most apparent in the elastic tissues of the skin, eyes and blood vessels. The clinical prevalence of PXE has been estimated at between 1 per 100,000 and 1 per 25,000, with slight female predominance. The first clinical sign of PXE is almost always small yellow papules on the nape and sides of the neck and in flexural areas...
May 10, 2017: Orphanet Journal of Rare Diseases
https://www.readbyqxmd.com/read/28484015/adaptation-of-cone-pigments-found-in-green-rods-for-scotopic-vision-through-a-single-amino-acid-mutation
#20
Keiichi Kojima, Yuki Matsutani, Takahiro Yamashita, Masataka Yanagawa, Yasushi Imamoto, Yumiko Yamano, Akimori Wada, Osamu Hisatomi, Kanto Nishikawa, Keisuke Sakurai, Yoshinori Shichida
Most vertebrate retinas contain a single type of rod for scotopic vision and multiple types of cones for photopic and color vision. The retinas of certain amphibian species uniquely contain two types of rods: red rods, which express rhodopsin, and green rods, which express a blue-sensitive cone pigment (M1/SWS2 group). Spontaneous activation of rhodopsin induced by thermal isomerization of the retinal chromophore has been suggested to contribute to the rod's background noise, which limits the visual threshold for scotopic vision...
May 8, 2017: Proceedings of the National Academy of Sciences of the United States of America
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