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https://www.readbyqxmd.com/read/28928940/comparison-of-color-discrimination-in-chronic-heavy-smokers-and-healthy-subjects
#1
Thiago Monteiro de Paiva Fernandes, Natalia Leandro Almeida, Natanael Antonio Dos Santos
Background: Cigarette smoke is probably the most significant source of exposure to toxic chemicals for humans, involving health-damaging components, such as nicotine, hydrogen cyanide and formaldehyde. The aim of the present study was to assess the influence of chronic heavy smoking on color discrimination (CD). Methods: All subjects were free of any neuropsychiatric disorder, identifiable ocular disease and had normal acuity. No abnormalities were detected in the fundoscopic examination and in the optical coherence tomography exam...
2017: F1000Research
https://www.readbyqxmd.com/read/28927319/angular-versus-curved-shapes-correspondences-and-emotional-processing
#2
Olesya Blazhenkova, Melisa Maya Kumar
The present work aimed to systematically examine sensory and higher level correspondences to angular and curved shapes. Participants matched angular and curved abstract shapes to sensory experiences in five different modalities as well as to emotion, gender, and name attributes presented as written labels (Study 1) and real experiences (Study 2). The results demonstrated nonarbitrary mapping of angular and curved shapes to attributes from all basic sensory modalities (vision, audition, gustation, olfaction, and tactation) and higher level attributes (emotion, gender, and name)...
January 1, 2017: Perception
https://www.readbyqxmd.com/read/28924434/ruptured-retinal-arterial-macroaneurysm-secondary-to-toxoplasmic-kyrieleis-arteriolitis-a-case-report
#3
Natalie Huang, W Andrew Lee, Sean Rivera, Sandra R Montezuma
PURPOSE: The aim of this report was to describe multimodal ocular imaging findings in a patient who presented with a ruptured retinal arterial macroaneurysm (RAM) associated with toxoplasmic Kyrieleis arteriolitis. METHODS: We report the case of a 64-year-old man with a history of systemic hypertension and dense amblyopia of the left eye who presented with decreased vision and new floaters in the left eye. Color fundus photography, spectral-domain optical coherence tomography, fluorescein angiography, and indocyanine green angiography were used as diagnostic imaging tools...
May 2017: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/28922130/haze-removal-using-radial-basis-function-networks-for-visibility-restoration-applications
#4
Bo-Hao Chen, Shih-Chia Huang, Chian-Ying Li, Sy-Yen Kuo
Restoration of visibility in hazy images is the first relevant step of information analysis in many outdoor computer vision applications. To this aim, the restored image must feature clear visibility with sufficient brightness and visible edges, while avoiding the production of noticeable artifacts. In this paper, we propose a haze removal approach based on the radial basis function (RBF) through artificial neural networks dedicated to effectively removing haze formation while retaining not only the visible edges but also the brightness of restored images...
September 15, 2017: IEEE Transactions on Neural Networks and Learning Systems
https://www.readbyqxmd.com/read/28913514/the-incidence-of-needle-stick-and-sharp-injuries-and-their-associations-with-visual-function-among-hospital-nurses
#5
Mohammad Ghasemi, Mehdi Khabazkhoob, Hassan Hashemi, Abbasali Yekta, Payam Nabovati
PURPOSE: To determine the one-year incidence of needle stick and sharp injuries (NSIs and SIs) and their associations with visual function among Iranian nurses. METHODS: In this cross-sectional study, 278 nurses working at one hospital were selected through stratified random sampling. After applying the exclusion criteria, the final analysis was performed on the data of 267 nurses. The data of occupational injuries were collected through a researcher-administered questionnaire...
September 2017: Journal of Current Ophthalmology
https://www.readbyqxmd.com/read/28910542/effect-of-monochromatic-light-on-circadian-rhythmic-expression-of-clock-genes-and-arylalkylamine-n-acetyltransferase-in-chick-retina
#6
Jing Cao, Jiang Bian, Zixu Wang, Yulan Dong, Yaoxing Chen
Birds have more developed visual function. They not only have the ability to detect light and darkness but also have the color vision. Previous study showed that monochromatic light influenced avian physiological processes, which were controlled by clock genes. Therefore, bird's eye is a good model to studying the impact of color of light on circadian rhythms. Avian retina is one of the most important central oscillations. The study was designed to investigate the effect of color of light on the expression of clock genes and arylalkylamine N-acetyltransferase (Aanat) mRNA expression in chick retina...
September 14, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28910168/reduced-central-retinal-artery-blood-flow-is-related-to-impaired-central-visual-function-in-retinitis-pigmentosa-patients
#7
Samantha Kayser, Patricia Vargas, Deborah Mendelsohn, Jorge Han, Hua Bi, Alexandra Benavente, Ava K Bittner
PURPOSE: We evaluated the test-retest repeatability of blood flow velocities in the retrobulbar central retinal artery (CRA) and explored whether reduced blood flow is related to the degree of visual function loss in retinitis pigmentosa (RP) patients with wide range of disease severity. MATERIALS AND METHODS: We measured CRA peak systolic velocity (PSV) and end diastolic velocity (EDV) to calculate mean flow velocity (MFV) in 18 RP patients using color Doppler imaging with spectral flow Doppler (GE Logiq7 ultrasound) twice in each eye at each of two visits within a month...
September 14, 2017: Current Eye Research
https://www.readbyqxmd.com/read/28894009/trichromacy-increases-fruit-intake-rates-of-wild-capuchins-cebus-capucinus-imitator
#8
Amanda D Melin, Kenneth L Chiou, Emily R Walco, Mackenzie L Bergstrom, Shoji Kawamura, Linda M Fedigan
Intraspecific color vision variation is prevalent among nearly all diurnal monkeys in the neotropics and is seemingly a textbook case of balancing selection acting to maintain genetic polymorphism. Clear foraging advantages to monkeys with trichromatic vision over those with dichromatic "red-green colorblind" vision have been observed in captive studies; however, evidence of trichromatic advantage during close-range foraging has been surprisingly scarce in field studies, perhaps as a result of small sample sizes and strong impacts of environmental or individual variation on foraging performance...
September 11, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28890683/rapid-processing-of-a-global-feature-in-the-on-visual-pathways-of-behaving-monkeys
#9
Jun Huang, Yan Yang, Ke Zhou, Xudong Zhao, Quan Zhou, Hong Zhu, Yingshan Yang, Chunming Zhang, Yifeng Zhou, Wu Zhou
Visual objects are recognized by their features. Whereas, some features are based on simple components (i.e., local features, such as orientation of line segments), some features are based on the whole object (i.e., global features, such as an object having a hole in it). Over the past five decades, behavioral, physiological, anatomical, and computational studies have established a general model of vision, which starts from extracting local features in the lower visual pathways followed by a feature integration process that extracts global features in the higher visual pathways...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28871934/diffuse-palmoplantar-keratoderma-onychodystrophy-universal-hypotrichosis-and-cysts
#10
Tasleem Arif, Syed Suhail Amin, Mohammad Adil, Mohd Mohtashim
Dear Editor, Clouston syndrome, also called hidrotic ectodermal dysplasia (HED), is an autosomal dominant ectodermal dysplasia characterized by a clinical triad of onychodystrophy, generalized hypotrichosis, and palmoplantar keratoderma (1). Herein we report the case of a 24-year-old male with the distinctive clinical triad associated with multiple epidermoid cysts, which probably reflects the phenotype of Clouston syndrome. A 24-year-old male presented to our Department with diffuse thickening of the skin of his palms and soles since infancy...
July 2017: Acta Dermatovenerologica Croatica: ADC
https://www.readbyqxmd.com/read/28871030/spatiochromatic-interactions-between-individual-cone-photoreceptors-in-the-human-retina
#11
William S Tuten, Wolf M Harmening, Ramkumar Sabesan, Austin Roorda, Lawrence C Sincich
A remarkable feature of human vision is that the retina and brain have evolved circuitry to extract useful spatial and spectral information from signals originating in a photoreceptor mosaic whose trichromatic constituents vary widely in their relative numbers and local spatial configurations. A critical early transformation applied to cone signals is horizontal-cell-mediated lateral inhibition, which imparts a spatially-antagonistic surround to individual cone receptive fields, a signature inherited by downstream neurons and implicated in color signaling...
September 4, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28866805/development-of-a-tool-to-aid-the-radiologic-technologist-using-augmented-reality-and-computer-vision
#12
REVIEW
Robert D MacDougall, Benoit Scherrer, Steven Don
This technical innovation describes the development of a novel device to aid technologists in reducing exposure variation and repeat imaging in computed and digital radiography. The device consists of a color video and depth camera in combination with proprietary software and user interface. A monitor in the x-ray control room displays the position of the patient in real time with respect to automatic exposure control chambers and image receptor area. The thickness of the body part of interest is automatically displayed along with a motion indicator for the examined body part...
September 2, 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/28860702/long-term-structural-retinal-changes-in-patients-with-optic-neuritis-related-to-multiple-sclerosis
#13
Maria Rene Andersen, Malte Roar, Tobias Sejbaek, Zsolt Illes, Jakob Grauslund
PURPOSE: To evaluate the long-term structural and functional outcome in patients with multiple sclerosis (MS) with and without a history of optic neuritis (ON). METHODS: This was a cross-sectional study of 82 patients diagnosed with MS between 2000 and 2006 from a tertiary hospital center in Denmark. Patients gave a self-reported history of ON, and functional (visual acuity and color vision) and structural (spectra domain optical coherence tomography) markers of vision were tested...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28857615/microbial-transglutaminase-in-noodle-and-pasta-processing
#14
Seyed Mohammad Taghi Gharibzahedi, Shima Yousefi, Ioannis S Chronakis
Nowadays, there is an aggressive rate in consumption of noodles and pasta products throughout the world. Consumer acceptability and preference of these functional products can be promoted by the discovery of novel knowledge to improve their formulation and quality. The development of fortified-formulations for noodles and pasta products based on microbial transglutaminase (MTGase) can guarantee the shelf life extension with minimum quality losses. The current review focuses on recent trends and future prospects of MTGase utilization in the structural matrix of noodles and pasta products and represents the quality changes of cooking loss, texture, microstructure, color and sensory attributes of the MTGase-incorporated products...
August 31, 2017: Critical Reviews in Food Science and Nutrition
https://www.readbyqxmd.com/read/28853393/parallel-activin-and-bmp-signaling-coordinates-r7-r8-photoreceptor-subtype-pairing-in-the-stochastic-drosophila-retina
#15
Brent S Wells, Daniela Pistillo, Erin Barnhart, Claude Desplan
Drosophila color vision is achieved by comparing outputs from two types of color-sensitive photoreceptors, R7 and R8. Ommatidia (unit eyes) are classified into two subtypes, known as 'pale' or 'yellow', depending on Rhodopsin expression in R7 and R8. Subtype specification is controlled by a stochastic decision in R7 and instructed to the underlying R8. We find that the Activin receptor Baboon is required in R8 to receive non-redundant signaling from the three Activin ligands, activating the transcription factor dSmad2...
August 30, 2017: ELife
https://www.readbyqxmd.com/read/28846119/detection-of-early-loss-of-color-vision-in-age-related-macular-degeneration-with-emphasis-on-drusen-and-reticular-pseudodrusen
#16
Roopa Vemala, Sobha Sivaprasad, John L Barbur
Purpose: To evaluate chromatic sensitivity in patients with age-related macular degeneration (AMD) characterized by drusen and reticular pseudodrusen. To investigate whether the severity of color vision loss can distinguish between various stages of AMD and hence be used as an index of progression toward advanced AMD. Methods: Chromatic sensitivity was measured by using the Color Assessment and Diagnosis (CAD) test in asymptomatic individuals with early and intermediate AMD and compared to normative data...
May 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28844659/recapitulation-of-human-retinal-development-from-human-pluripotent-stem-cells-generates-transplantable-populations-of-cone-photoreceptors
#17
Anai Gonzalez-Cordero, Kamil Kruczek, Arifa Naeem, Milan Fernando, Magdalena Kloc, Joana Ribeiro, Debbie Goh, Yanai Duran, Samuel J I Blackford, Laura Abelleira-Hervas, Robert D Sampson, Ian O Shum, Matthew J Branch, Peter J Gardner, Jane C Sowden, James W B Bainbridge, Alexander J Smith, Emma L West, Rachael A Pearson, Robin R Ali
Transplantation of rod photoreceptors, derived either from neonatal retinae or pluripotent stem cells (PSCs), can restore rod-mediated visual function in murine models of inherited blindness. However, humans depend more upon cone photoreceptors that are required for daylight, color, and high-acuity vision. Indeed, macular retinopathies involving loss of cones are leading causes of blindness. An essential step for developing stem cell-based therapies for maculopathies is the ability to generate transplantable human cones from renewable sources...
September 12, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28837966/l-m-cone-opponency-in-visual-evoked-potentials-of-human-cortex
#18
Mirella Telles Salgueiro Barboni, Balázs Vince Nagy, Cristiane Maria Gomes Martins, Daniela Maria Oliveria Bonci, Einat Hauzman, Avinash Aher, Tina I Tsai, Jan Kremers, Dora Fix Ventura
L and M cones send their signals to the cortex using two chromatic (parvocellular and blue-yellow koniocellular) and one luminance (magnocellular) pathways. These pathways contain ON and OFF subpathways that respond to excitation increments and decrements respectively. Here, we report on visually evoked potentials (VEP) recordings that reflect L- and M-cone driven increment (LI and MI) and decrement (LD and MD) activity. VEP recordings were performed on 12 trichromats and four dichromats (two protanopes and two deuteranopes)...
August 1, 2017: Journal of Vision
https://www.readbyqxmd.com/read/28837721/visual-function-in-asymptomatic-patients-with-homozygous-sickle-cell-disease-and-temporal-macular-atrophy
#19
Gilles C Martin, Charlotte Dénier, Olivia Zambrowski, David Grévent, Lenaïc Bruère, Valentine Brousse, Mariane de Montalembert, Dominique Brémond-Gignac, Matthieu P Robert
Importance: Temporal macular involvement in sickle cell disease can now easily be detected by optical coherence tomography (OCT). However, while recent studies have demonstrated its high prevalence, little is known about its potential consequences on visual function. Objective: To assess the visual function of patients with sickle cell disease with no visual symptoms despite temporal macular atrophy. Design, Setting, and Participants: This retrospective case series included data collection and explorations made in a single referral center for sickle cell disease in 2016...
August 24, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28836685/occupational-styrene-exposure-and-acquired-dyschromatopsia-a-systematic-review-and-meta-analysis
#20
REVIEW
Ariel R Choi, Joseph M Braun, George D Papandonatos, Paul B Greenberg
BACKGROUND: Styrene is a chemical used in the manufacture of plastic-based products worldwide. We systematically reviewed eligible studies of occupational styrene-induced dyschromatopsia, qualitatively synthesizing their findings and estimating the exposure effect through meta-analysis. METHODS: PubMed, EMBASE, and Web of Science databases were queried for eligible studies. Using a random effects model, we compared measures of dyschromatopsia between exposed and non-exposed workers to calculate the standardized mean difference (Hedges'g)...
August 24, 2017: American Journal of Industrial Medicine
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