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https://www.readbyqxmd.com/read/29047503/subpixel-area-based-evaluation-for-crosstalk-suppression-in-quasi-three-dimensional-displays
#1
Zhenfeng Zhuang, Phil Surman, Qijia Cheng, Simon Thibault, Yuanjin Zheng, Xiao Wei Sun
A subpixel area-based evaluation method for an improved slanted lenticular film that minimizes the crosstalk in a quasi-three-dimensional (Q3D) display is proposed in this paper. To identify an optimal slant angle of the film, a subpixel area-based measurement is derived to evaluate the crosstalk among viewing regions of the intended subpixel and adjacent unintended subpixel by taking the real subpixel shape and black matrix into consideration. The subpixel mapping, which corresponds to the optimal slant angle of the film, can then be determined...
July 1, 2017: Applied Optics
https://www.readbyqxmd.com/read/29036109/transparency-in-stereopsis-parallel-encoding-of-overlapping-depth-planes
#2
Adam Reeves, David Lynch
We report that after extensive training, expert adults can accurately report the number, up to six, of transparent overlapping depth planes portrayed by brief (400 ms or 200 ms) random-element stereoscopic displays, and can well discriminate six from seven planes. Naïve subjects did poorly above three planes. Displays contained seven rows of 12 randomly located ×'s or +'s; jittering the disparities and number in each row to remove spurious cues had little effect on accuracy. Removing the central 3° of the 10° display to eliminate foveal vision hardly reduced the number of reportable planes...
August 1, 2017: Journal of the Optical Society of America. A, Optics, Image Science, and Vision
https://www.readbyqxmd.com/read/29034158/malignant-choroidal-melanoma-with-suspected-vitreous-seeding-a-case-report
#3
Wen-Hsin Cheng, Cheng-Hsien Chang, Hsien-Chung Lin, Ya-Chi Chen, Chun-Chieh Wu
Retinal perforation with vitreous seeding is an uncommon condition of treatment-naïve choroidal malignant melanoma. We reported a 52-year-old male who had a pigmented tumor protruding from choroid of his right eye. He had only black shadow sensation for 4 months then a rapid deterioration of vision. Fundus examination showed vitreous haze with many pigmented materials. B-scan ultrasonography revealed a mass with low internal reflectivity and vitreous opacity. The eyeball was enucleated and a stage IIIA melanoma was confirmed by the pathologist...
July 2017: Taiwan Journal of Ophthalmology
https://www.readbyqxmd.com/read/29031740/eyetracking-metrics-reveal-impaired-spatial-anticipation-in-behavioural-variant-frontotemporal-dementia
#4
Silvia Primativo, Camilla Clark, Keir Xx Yong, Nicholas C Firth, Jennifer Nicholas, Daniel Alexander, Jason D Warren, Jonathan D Rohrer, Sebastian J Crutch
Eyetracking technology has had limited application in the dementia field to date, with most studies attempting to discriminate syndrome subgroups on the basis of basic oculomotor functions rather than higher-order cognitive abilities. Eyetracking-based tasks may also offer opportunities to reduce or ameliorate problems associated with standard paper-and-pencil cognitive tests such as the complexity and linguistic demands of verbal test instructions, and the problems of tiredness and attention associated with lengthy tasks that generate few data points at a slow rate...
October 11, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/29026363/highly-accelerated-onset-of-hydroxychloroquine-macular-retinopathy
#5
Ethan M Stern, Jordan S Johnson, Donald A Mazzulla
BACKGROUND: Hydroxychloroquine (HCQ, Plaquenil) is often prescribed in lieu of other sulfate antimalarials to treat rheumatologic diseases because of its pharmacologic efficacy and few reported side effects. However, a known potential side effect of HCQ is retinal toxicity. CASE REPORT: A 61-year-old black female presented for screening of ophthalmic disease 2 months after initiation of HCQ for the treatment of polyarthralgia with a positive rheumatoid factor. At the time of the examination, she had taken a cumulative total of 19...
2017: Ochsner Journal
https://www.readbyqxmd.com/read/28991687/cerebrospinal-fluid-total-protein-in-idiopathic-intracranial-hypertension
#6
Damian E Berezovsky, Beau B Bruce, Caroline Vasseneix, Jason H Peragallo, Nancy J Newman, Valérie Biousse
OBJECTIVE: To evaluate the relationship between CSF total protein concentration (CSF protein) and CSF opening pressure in idiopathic intracranial hypertension (IIH), and to explore the association of age, gender, race, BMI, and Humphrey visual field mean deviation (HVF MD) with CSF total protein. METHODS: The medical records of all IIH patients seen between 1989 and 2016 at one institution were systematically reviewed for demographics, CSF opening pressure, CSF contents, and HVF MD (at initial evaluation and most recent follow-up)...
October 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28987906/visually-evoked-responses-from-the-blind-field-of-hemianopic-patients
#7
Javier Sanchez-Lopez, Caterina A Pedersini, Francesco Di Russo, Nicolò Cardobi, Cristina Fonte, Valentina Varalta, Massimo Prior, Nicola Smania, Silvia Savazzi, Carlo A Marzi
Hemianopia is a visual field defect characterized by decreased vision or blindness in the contralesional visual field of both eyes. The presence of well documented above-chance unconscious behavioural responses to visual stimuli presented to the blind hemifield (blindsight) has stimulated a great deal of research on the neural basis of this important phenomenon. The present study is concerned with electrophysiological responses from the blind field. Since previous studies found that transient Visual Evoked Potentials (VEPs) are not entirely suitable for this purpose here we propose to use Steady-State VEPs (SSVEPs)...
October 5, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28982343/study-of-glucose-6-phosphate-dehydrogenase-deficiency-5-years-retrospective-egyptian-study
#8
Adel Abd Elhaleim Hagag, Ibrahim M Badraia, Mohamed S Elfarargy, Mohamed M Abd Elmageed, Ehab A Abo-Ali
BACKGROUND: Glucose-6-phosphate dehydrogenase (G6PD) deficiency is the most common enzyme deficiency worldwide that causes a spectrum of diseases including neonatal hyperbilirubinemia, acute and chronic hemolysis after exposure to an oxidative stress. AIM OF THE WORK: This five years retrospective study was carried out to study the demographic, clinical and laboratory data of 1000 patients with G6PD deficiency anemia registered in Hematology Unit, Pediatric Department, Tanta University Hospital...
October 3, 2017: Endocrine, Metabolic & Immune Disorders Drug Targets
https://www.readbyqxmd.com/read/28973042/oca2-splice-site-variant-in-german-spitz-dogs-with-oculocutaneous-albinism
#9
Madleina Caduff, Anina Bauer, Vidhya Jagannathan, Tosso Leeb
We investigated a German Spitz family where the mating of a black male to a white female had yielded three puppies with an unexpected light brown coat color, lightly pigmented lips and noses, and blue eyes. Combined linkage and homozygosity analysis based on a fully penetrant monogenic autosomal recessive mode of inheritance identified a critical interval of 15 Mb on chromosome 3. We obtained whole genome sequence data from one affected dog, three wolves, and 188 control dogs. Filtering for private variants revealed a single variant with predicted high impact in the critical interval in LOC100855460 (XM_005618224...
2017: PloS One
https://www.readbyqxmd.com/read/28956826/sun-exposure-sun-related-symptoms-and-sun-protection-practices-in-an-african-informal-traditional-medicines-market
#10
Caradee Y Wright, Tarylee Reddy, Angela Mathee, Renée A Street
Informal workers in African market trade have little formal protection against sun exposure. We aimed to examine sun exposure, sun-related symptoms, and sun protection practices in an informal occupational setting. Trained fieldworkers asked 236 workers in the Warwick Junction market about their workplace, skin and eye sensitivity and skin colour, symptoms faced at work during the summer due to heat, and preventive measures. Data were analyzed using univariate logistic regression to assess the effect of gender and the risk of experiencing symptoms to sun exposure in relation to pre-existing diseases and perception of sun exposure as a hazard...
September 28, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28956467/design-of-optical-system-for-binocular-fundus-camera
#11
Jun Wu, Shiliang Lou, Zhitao Xiao, Lei Geng, Fang Zhang, Wen Wang, Mengjia Liu
A non-mydriasis optical system for binocular fundus camera has been designed in this paper. It can capture two images of the same fundus retinal region from different angles at the same time, and can be used to achieve three-dimensional reconstruction of fundus. It is composed of imaging system and illumination system. In imaging system, Gullstrand Le Grand eye model is used to simulate normal human eye, and Schematic eye model is used to test the influence of ametropia in human eye on imaging quality. Annular aperture and black dot board are added into illumination system, so that the illumination system can eliminate stray light produced by corneal-reflected light and omentoscopic lens...
September 28, 2017: Computer Assisted Surgery (Abingdon, England)
https://www.readbyqxmd.com/read/28949971/assessment-of-patient-perception-of-glaucomatous-visual-field-loss-and-its-association-with-disease-severity-using-amsler-grid
#12
Kenji Fujitani, Daniel Su, Mark P Ghassibi, Joseph L Simonson, Jeffrey M Liebmann, Robert Ritch, Sung Chul Park
PURPOSE: To investigate patients' perception of glaucomatous VF loss and its association with glaucoma severity using the Amsler grid test. METHODS: In this prospective cross-sectional study, glaucoma patients with abnormal 10-2 Humphrey Swedish Interactive Threshold Algorithm-standard VF tests were enrolled consecutively. All patients underwent a black-on-white Amsler grid test for each eligible eye. They were asked to outline any perceived scotomas (areas with abnormal grid lines) on the grid and then describe verbally their perception of the scotomas...
2017: PloS One
https://www.readbyqxmd.com/read/28948317/chromium-nickel-and-cobalt-in-cosmetic-matrices-an-integrated-bioanalytical-characterization-through-total-content-bioaccessibility-and-cr-iii-cr-vi-speciation
#13
Maria Concetta Bruzzoniti, Ornella Abollino, Marco Pazzi, Luca Rivoira, Agnese Giacomino, Marco Vincenti
The presence of certain metals naturally contained inside raw materials (e.g., pigments) used to produce cosmetics for make-up may represent a serious concern for the final quality and safety of the product. The knowledge of the total concentration of metals is not sufficient to predict their reactivity and their toxicological profile. For these reasons, we set up a comprehensive approach to characterize the content of Co, Cr, and Ni in two raw materials for cosmetic production, a black iron oxide and a pearly pigment, and in a finished product, pearly powder eye shadow...
September 25, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28939335/post-embryonic-changes-in-the-hindgut-of-honeybee-apis-mellifera-workers-morphology-cuticle-deposition-apoptosis-and-cell-proliferation
#14
Wagner Gonzaga Gonçalves, Kenner Morais Fernandes, Weyder Cristiano Santana, Gustavo Ferreira Martins, José Cola Zanuncio, José Eduardo Serrão
In insects, the hindgut is a homeostatic region of the digestive tract, divided into pylorus, ileum, and rectum, that reabsorbs water, ions, and small molecules produced during hemolymph filtration. The hindgut anatomy in bee larvae is different from that of adult workers. This study reports the morphological changes and cellular events that occur in the hindgut during the metamorphosis of the honeybee Apis mellifera. We describe the occurrence of autophagosomes and the ultrastructure of the epithelial cells and cuticle, suggesting that cuticular degradation begins in prepupae, with the cuticle being reabsorbed and recycled by autophagosomes in white- and pink-eyed pupae, followed by the deposition of new cuticle in light-brown-eyed pupae...
September 20, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28920775/laparoscopic-assisted-insertion-of-a-ventriculoperitoneal-shunt-in-a-rescued-asiatic-black-bear-ursus-thibetanus-in-laos
#15
Romain Pizzi, Jonathan Mark Cracknell, Andrew C Kitchener, Nev Broadis, Denise Laughlin, Kirsty Officer, Yolanda Martinez Pereira, Matt Hunt
A 3-yr-old Asiatic black bear (Ursus thibetanus), weighing 68 kg, underwent a laparoscopic-assisted placement of a ventriculoperitoneal shunt for hydrocephalus in the Lao People's Democratic Republic. Rescued as a young cub with a notably domed head, the bear's condition had deteriorated with age, but euthanasia was not a viable option because of cultural issues. Surgery was attempted as a palliative measure. The bear had ventrally orientated crossed eyes (abducens nerve palsy and dorsal midbrain syndrome), papilledema, severe rhinorrhea, depressed mentation, lethargy, a very poor appetite, and was stunted...
September 2017: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/28910416/lateralized-behaviour-as-indicator-of-affective-state-in-dairy-cows
#16
Sarah Kappel, Michael T Mendl, David C Barrett, Joanna C Murrell, Helen R Whay
In humans, there is evidence that sensory processing of novel or threatening stimuli is right hemisphere dominated, especially in people experiencing negative affective states. There is also evidence for similar lateralization in a number of non-human animal species. Here we investigate whether this is also the case in domestic cattle that may experience long-term negative states due to commonly occurring conditions such as lameness. Health and welfare implications associated with pain in lame cows are a major concern in dairy farming...
2017: PloS One
https://www.readbyqxmd.com/read/28880982/association-between-eyelid-laxity-and-obstructive-sleep-apnea
#17
Timothy P Fox, Jeffrey A Schwartz, Aimee C Chang, Fatemeh P Parvin-Nejad, Cindi K Yim, Steven H Feinsilver, Albert Y Wu
Importance: While much has been reported on the relationship between floppy eyelid syndrome and obstructive sleep apnea (OSA), the diagnostic criteria of floppy eyelid syndrome are often subjective and vague. Objective: To evaluate the association between OSA and quantitative markers of eyelid laxity or secondary ocular surface disease in a sleep clinic population. Design, Setting, and Participants: This investigation was a cross-sectional observational study at the Center for Sleep Medicine at Icahn School of Medicine at Mount Sinai...
October 1, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28873168/vision-screening-in-children-aged-6-months-to-5-years-us-preventive-services-task-force-recommendation-statement
#18
David C Grossman, Susan J Curry, Douglas K Owens, Michael J Barry, Karina W Davidson, Chyke A Doubeni, John W Epling, Alex R Kemper, Alex H Krist, Ann E Kurth, C Seth Landefeld, Carol M Mangione, Maureen G Phipps, Michael Silverstein, Melissa A Simon, Chien-Wen Tseng
Importance: One of the most important causes of vision abnormalities in children is amblyopia (also known as "lazy eye"). Amblyopia is an alteration in the visual neural pathway in a child's developing brain that can lead to permanent vision loss in the affected eye. Among children younger than 6 years, 1% to 6% have amblyopia or its risk factors (strabismus, anisometropia, or both). Early identification of vision abnormalities could prevent the development of amblyopia. Subpopulation Considerations: Studies show that screening rates among children vary by race/ethnicity and family income...
September 5, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28861020/qualitatively-coherent-representation-makes-decision-making-easier-with-binary-colored-multi-attribute-tables-an-eye-tracking-study
#19
Masahiro Morii, Takashi Ideno, Kazuhisa Takemura, Mitsuhiro Okada
We aimed to identify the ways in which coloring cells affected decision-making in the context of binary-colored multi-attribute tables, using eye movement data. In our black-white attribute tables, the value of attributes was limited to two (with a certain threshold for each attribute) and each cell of the table was colored either black or white on the white background. We compared the two natural ways of systematic color assignment: "quantitatively coherent" ways and "qualitatively coherent" ways (namely, the ways in which the black-white distinction represented the quantitative amount distinction, and the ways in which the black-white distinction represented the quality distinction)...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28823136/identification-of-polymorphisms-in-mitf-and-dct-genes-and-their-associations-with-plumage-colors-in-asian-duck-breeds
#20
Hasina Sultana, Dongwon Seo, Nu-Ri Choi, Md Shamsul Alam Bhuiyan, Seung Hwan Lee, Kang Nyeong Heo, Jun Heon Lee
Objective: The aim of this study was to investigate the effect of single nucleotide polymorphisms (SNPs) of the MITF and DCT genes on plumage coloration in Asian native duck breeds. MITF encodes a protein for microphthalmia-associated transcription factor, which regulates the development and function of melanocytes for pigmentation of skin, hair, and eyes. Among the tyrosinase-related family genes, dopachrome tautomerase (DCT) is a pigment cell-specific gene that plays important roles in the melanin synthesis pathway and the expression of skin, feather, and retina color...
August 16, 2017: Asian-Australasian Journal of Animal Sciences
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