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Robert W Kentridge
When visual information about an object's distance is obscured, but its retinal size visible, the object's physical size is ambiguous to vision; however, additional proprioceptive distance information permits physical size to be estimated when grasping the object, but perceptual size estimates remain inaccurate, adding to that evidence for distinct visual pathways for perception and action.
March 19, 2018: Current Biology: CB
Weston Balch
No abstract text is available yet for this article.
March 2018: Biomedical Instrumentation & Technology
José Ignacio Fernández-Vigo, Lucía De-Pablo-Gómez-de-Liaño, Bachar Kudsieh, Cristina Fernández-Vigo, José Ángel Fernández-Vigo, Julián García-Feijóo
PURPOSE: To describe the presence of anterior chamber angle (ACA) tissue as an incidental optical coherence tomography (OCT) finding in healthy children. METHODS: For this cross-sectional study, we reviewed Fourier domain OCT images obtained in 422 children as candidates for inclusion in a prior study who visited our clinic for a routine vision test. The presence of angle tissue was assessed in the nasal and temporal quadrants. On tomographies showing angle tissue, several measurements were made including ACA width and trabecular meshwork (TM) length and size...
March 19, 2018: Journal of Glaucoma
Shigeki Hashimoto, Chota Matsumoto, Mariko Eura, Sachiko Okuyama, Hiroki Nomoto, Fumi Tanabe, Tomoyasu Kayazawa, Aiko Iwase, Yoshikazu Shimomura
PURPOSE: To evaluate the distribution and progression of glaucomatous visual field (VF) defects with binocular vision. PATIENTS AND METHODS: Subjects were 167 patients (average age, 67±10.7▒y) with glaucoma who received the Humphrey 24-2 VF test (SITA-Standard) for the two eyes. Using the Best Location Algorithm, patient's integrated binocular VF (IVF) was calculated from their Humphrey 24-2 results. Of 167, 77 subjects (average age, 68±11.0▒y) also underwent monocular/binocular Humphrey Esterman tests...
March 19, 2018: Journal of Glaucoma
Michael Oeverhaus, Margarethe Fischer, Herbert Hirche, Anke Schlüter, Joachim Esser, Anja K Eckstein
BACKGROUND/AIMS: We performed a retrospective analysis to examine clinical results, establish a dose-effect coefficient and analyze the long-term efficacy of tendon elongation with bovine pericardium (Tutopatch®) for surgical correction of severe esotropia, occurring after three-wall orbital decompression for dysthyroid optic neuropathy in patients with Graves' orbitopathy (GO). METHODS: Tendon elongation of the medial rectus muscle (MR) was performed in our institution using an interponate of bovine pericardium in 60 patients (27 underwent unilateral and 33 bilateral surgery)...
March 20, 2018: Strabismus
Tong Shu, Jianxing Wang, Lei Su, Xueji Zhang
Recent researches in metal nanoclusters (NCs) have prompted their promising practical applications in biomedical fields as novel inorganic luminophores. More recently, to further improve the photoluminescence (PL) performance of NCs, the aggregation-induced emission (AIE) effect has been introduced to develop highly luminescent metal NCs and metal complex materials. In this review, we start our discussion from recent progresses on AIE materials developments. Then, we address our understandings on the PL properties of thiolated metal NCs...
March 20, 2018: Critical Reviews in Analytical Chemistry
Monika Lakk, Felix Vazquez-Chona, Oleg Yarishkin, David Križaj
Unesterified cholesterol controls the fluidity, permeability and electrical properties of eukaryotic cell membranes. Consequently, cholesterol levels in the retina and the brain are tightly regulated whereas depletion or oversupply caused by diet or heredity contribute to neurodegenerative diseases and vision loss. Astroglia play a central role in the biosynthesis, uptake and transport of cholesterol and also drive inflammatory signaling under hypercholesterolemic conditions associated with high-fat diet (diabetes) and neurodegenerative disease...
February 2018: Neural Regeneration Research
Mohan P Joshi, Chifumbe Chintu, Mirfin Mpundu, Dan Kibuule, Oliver Hazemba, Tenaw Andualem, Martha Embrey, Bayobuya Phulu, Heran Gerba
The multi-faceted complexities of antimicrobial resistance (AMR) require consistent action, a multidisciplinary approach, and long-term political commitment. Building coalitions can amplify stakeholder efforts to carry out effective AMR prevention and control strategies. We have developed and implemented an approach to help local stakeholders kick-start the coalition-building process. The five-step process is to (1) mobilise support, (2) understand the local situation, (3) develop an action plan, (4) implement the plan, and (5) monitor and evaluate...
March 20, 2018: Global Public Health
Antonio Pesce, Michele Diana
No abstract text is available yet for this article.
March 1, 2018: Surgical Innovation
Magalie S Leduc, Marianne Mcguire, Suneeta Madan-Khetarpal, Damara Ortiz, Susan Hayflick, Kory Keller, Christine M Eng, Yaping Yang, Weimin Bi
PRR12 encodes a proline-rich protein nuclear factor suspected to be involved in neural development. Its nuclear expression in fetal brains and in the vision system supports its role in brain and eye development more specifically. However, its function and potential role in human disease has not been determined. Recently, a de novo t(10;19) (q22.3;q13.33) translocation disrupting the PRR12 gene was detected in a girl with intellectual disability and neuropsychiatric alterations. Here we report on three unrelated patients with heterozygous de novo apparent loss-of-function mutations in PRR12 detected by clinical whole exome sequencing: c...
March 19, 2018: Human Genetics
Vandana Padala, Arindam Basu, Garrick Orchard
Asynchronous event-based sensors, or "silicon retinae," are a new class of vision sensors inspired by biological vision systems. The output of these sensors often contains a significant number of noise events along with the signal. Filtering these noise events is a common preprocessing step before using the data for tasks such as tracking and classification. This paper presents a novel spiking neural network-based approach to filtering noise events from data captured by an Asynchronous Time-based Image Sensor on a neuromorphic processor, the IBM TrueNorth Neurosynaptic System...
2018: Frontiers in Neuroscience
Adel Alharf, Nasser Alqahtani, Ghazi Saeed, Ali Alshahrani, Mubarak Alshahrani, Nasser Aljasser, Mohammed Alquwaizani, Saleh Bawazir
Pharmacovigilance is vital to public health. Adopting a robust spontaneous reporting system for adverse drug events can counteract most hazards that arise from utilizing medicinal products. Prior to the establishment of the Saudi Food and Drug Authority (SFDA), the number of pharmacovigilance-related activities in Saudi Arabia was limited. In 2009, the SFDA established the National Pharmacovigilance and Drug Safety Center (Saudi Vigilance). The pharmacovigilance system has remarkably improved during the past few years...
March 2018: Saudi Pharmaceutical Journal: SPJ: the Official Publication of the Saudi Pharmaceutical Society
Jost B Jonas, Wen Bin Wei, Li Ping Zhu, Liang Xu, Ya Xing Wang
To examine associations between cognitive function and ophthalmological parameters, the population-based Beijing Eye Study examined ophthalmologically and physically 3127 individuals (mean age: 64.2 ± 9.8 years). Using the mini-mental state examination, cognitive function was assessed as cognitive function score (CFS). Mean CFS was 26.3 ± 3.7 (median: 27; range: 2-30). Prevalence of mild (CFS: 23-19), moderate (CFS: 18-10) and severe cognitive dysfunction was 9.6% (95% confidence interval (CI): 8...
March 19, 2018: Scientific Reports
C Schnedermann, X Yang, M Liebel, K M Spillane, J Lugtenburg, I Fernández, A Valentini, I Schapiro, M Olivucci, P Kukura, R A Mathies
Vibronic coupling is key to efficient energy flow in molecular systems and a critical component of most mechanisms invoking quantum effects in biological processes. Despite increasing evidence for coherent coupling of electronic states being mediated by vibrational motion, it is not clear how and to what degree properties associated with vibrational coherence such as phase and coupling of atomic motion can impact the efficiency of light-induced processes under natural, incoherent illumination. Here, we show that deuteration of the H11 -C11 =C12 -H12 double-bond of the 11-cis retinal chromophore in the visual pigment rhodopsin significantly and unexpectedly alters the photoisomerization yield while inducing smaller changes in the ultrafast isomerization dynamics assignable to known isotope effects...
March 19, 2018: Nature Chemistry
Ilaria Savelli, Iñigo Novales Flamarique, Tom Iwanicki, John S Taylor
Variable expression of visual pigment proteins (opsins) in cone photoreceptors of the vertebrate retina is a primary determinant of vision plasticity. Switches in opsin expression or variable co-expression of opsins within differentiated cones have been documented for a few rodents and fishes, but the extent of photoreceptor types affected and potential functional significance are largely unknown. Here, we show that both single and double cones in the retina of a flatfish, the starry flounder (Platichthys stellatus), undergo visual pigment changes through opsin switches or variable opsin co-expression...
March 19, 2018: Scientific Reports
Hsin-Hao Yu, Nafiseh Atapour, Tristan A Chaplin, Katrina H Worthy, Marcello G P Rosa
Lesions of striate cortex (V1) trigger massive retrograde degeneration of neurons in the lateral geniculate nucleus (LGN). In primates, these lesions also lead to scotomas within which conscious vision is abolished. Mediation of residual visual capacity within these regions (blindsight) has been traditionally attributed to an indirect visual pathway to the extrastriate cortex, which involves the superior colliculus and pulvinar complex. However, recent studies have suggested that preservation of the LGN is critical for behavioral evidence of blindsight, raising the question of what type of visual information is channeled by remaining neurons in this structure...
March 19, 2018: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
Viviana Betti, Maurizio Corbetta, Francesco de Pasquale, Vincent Wens, Stefania Della Penna
Networks hubs represent points of convergence for the integration of information across many different nodes and systems. While a great deal is known on the topology of hub regions in the human brain, little is known about their temporal dynamics. Here, we examine the static and dynamic centrality of hub regions when measured in the absence of a task (rest) or during the observation of natural or synthetic visual stimuli. We used Magnetoencephalography (MEG) in humans (both sexes) to measure static and transient regional and network-level interaction in α and β band limited power (BLP) in three conditions: visual fixation (rest), viewing of movie clips (natural vision), and time-scrambled versions of the same clips (scrambled vision)...
March 19, 2018: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
Vivekanand U Warkad, Lapam Panda, Pradeep Behera, Taraprasad Das, Bikash C Mohanta, Rohit Khanna
PURPOSE: To estimate the prevalence and causes of visual impairment and other ocular comorbidities among tribal children in an urban school population in eastern India. METHOD: In this cross-sectional study, vision screening tests were administered to tribal school children. Demographic data, including name, age, sex, home district, height, and weight of each child, and examination data, including unaided and pinhole visual acuity, external eye examination with a flashlight, slit-lamp examination, intraocular pressure (IOP) measurement, and undilated fundus photography, were collected...
March 16, 2018: Journal of AAPOS: the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
Hui Liu, Frank Gambino, Crystal Algenio, Charles Bouchard, Liang Qiao, Ping Bu, Shaozhen Zhao
Dry Eye Disease (DED) is a very common disorder that can result in severe disability and vision loss. Although the pathogenesis of DED is not fully understood, hyperosmolarity, inflammation, and tear film instability are recognized as hallmarks of DED. Recently, Nucleoside Reverse Transcriptase Inhibitors (NRTIs), a class of medication used to treat HIV, have been shown to inhibit inflammation in a mouse model of retinal atrophy. In this study, we investigated whether Zidovudine (AZT) can inhibit human corneal epithelial cell (HCEC) inflammatory responses under hyperosmotic conditions...
March 16, 2018: Biochemical and Biophysical Research Communications
Michael A Preston, Glen P Mays, Zoran Bursac, Billy R Thomas, Jonathan Laryea, J Mick Tilford, Michelle Odlum, Sharla A Smith, Ronda S Henry-Tillman
Precision public health requires research that supports innovative systems and health delivery approaches, programs, and policies that are part of this vision. This study estimated the effects of health insurance mandate (HiM) variations and the effects of physician utilization on moderating colorectal cancer (CRC) screening rates. A time-series analysis using a difference-in-difference-in-differences (DDD) approach was conducted on CRC screenings (1997-2014) using a multivariate logistic framework. Key variables of interest were HiM, CRC screening status, and physician utilization...
March 2, 2018: American Journal of Surgery
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