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https://www.readbyqxmd.com/read/29227249/eye-opening-differentially-modulates-inhibitory-synaptic-transmission-in-the-developing-visual-cortex
#1
Wuqiang Guan, Jun-Wei Cao, Lin-Yun Liu, Zhi-Hao Zhao, Yinghui Fu, Yong-Chun Yu
Eye opening, a natural and timed event during animal development, influences cortical circuit assembly and maturation; yet, little is known about its precise effect on inhibitory synaptic connections. Here we show that coinciding with eye opening, the strength of unitary inhibitory postsynaptic currents (uIPSCs) from somatostatin-expressing interneurons (Sst-INs) to nearby excitatory neurons, but not interneurons, sharply decreases in layer 2/3 of the mouse visual cortex. In contrast, the strength of uIPSCs from fast-spiking interneurons (FS-INs) to excitatory neurons significantly increases during eye opening...
December 11, 2017: ELife
https://www.readbyqxmd.com/read/29225658/intraspecific-eye-color-variability-in-birds-and-mammals-a-recent-evolutionary-event-exclusive-to-humans-and-domestic-animals
#2
Juan J Negro, M Carmen Blázquez, Ismael Galván
Background: Human populations and breeds of domestic animals are composed of individuals with a multiplicity of eye (= iris) colorations. Some wild birds and mammals may have intraspecific eye color variability, but this variation seems to be due to the developmental stage of the individual, its breeding status, and/or sexual dimorphism. In other words, eye colour tends to be a species-specific trait in wild animals, and the exceptions are species in which individuals of the same age group or gender all develop the same eye colour...
2017: Frontiers in Zoology
https://www.readbyqxmd.com/read/29223649/novel-liposome-based-and-in-situ-gelling-artificial-tear-formulation-for-dry-eye-disease-treatment
#3
Duygu Acar, Irene Teresa Molina-Martínez, Miguel Gómez-Ballesteros, Manuel Guzmán-Navarro, José Manuel Benítez-Del-Castillo, Rocío Herrero-Vanrell
PURPOSE: Artificial tears are widely used in the treatment of dry eye disease, although current formulations do not closely resemble natural tears. The purpose of this study was the design and characterization of a novel in situ gelling artificial tear formulation, containing both lipid and aqueous components, in order to resemble natural tears and replenish the tear film. METHODS: Liposomes, containing phosphatidylcholine, cholesterol, vitamins A and E, were prepared by the thin-film hydration method...
December 6, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/29217022/focal-limbal-stem-cell-deficiency-associated-with-soft-contact-lens-wear
#4
Karolien Termote, Steven Schendel, Gregory Moloney, Simon P Holland, Alex P Lange
OBJECTIVE: The aim of this study is to summarize the clinical characteristics of patients with contact lens-associated focal limbal stem cell deficiency (FLSCD) from a tertiary corneal referral centre. DESIGN: Retrospective, observational case series in a tertiary care centre. METHODS: Patients with contact lens-associated FLCSD were identified in our database. Clinical data were retrieved by chart review. A questionnaire asking for contact lens brand, type, cleaning solution, and duration of contact lens wear was sent to the patients with telephone follow-up...
December 2017: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
https://www.readbyqxmd.com/read/29216189/new-intraocular-pressure-measurement-method-using-reflected-pneumatic-pressure-from-cornea-deformed-by-air-puff-of-ring-type-nozzle
#5
Hyung Jin Kim, Yeong Ho Seo, Byeong Hee Kim
In this study, a non-contact type intraocular pressure (IOP) measuring system using reflected pneumatic pressure is proposed to overcome the disadvantages of existing measurement systems. A ring-type nozzle, a key component in the proposed system, is designed via computational fluid analysis. It predicts the reflected pneumatic pressure based on the nozzle exit angle and inner and outer diameters of the nozzle, which are 30°, 7 mm, and 9 mm, respectively. Performance evaluation is conducted using artificial eyes fabricated using polydimethylsiloxane with the specifications of human eyes...
2017: PloS One
https://www.readbyqxmd.com/read/29215594/facile-determination-of-sodium-ion-and-osmolarity-in-artificial-tears-by-sequential-dnazymes
#6
Eun Hye Kim, Eun-Song Lee, Dong Yun Lee, Young-Pil Kim
Despite high relevance of tear osmolarity and eye abnormality, numerous methods for detecting tear osmolarity rely upon expensive osmometers. We report a reliable method for simply determining sodium ion-based osmolarity in artificial tears using sequential DNAzymes. When sodium ion-specific DNAzyme and peroxidase-like DNAzyme were used as a sensing and detecting probe, respectively, the concentration of Na⁺ in artificial tears could be measured by absorbance or fluorescence intensity, which was highly correlated with osmolarity over the diagnostic range (R² > 0...
December 7, 2017: Sensors
https://www.readbyqxmd.com/read/29213179/on-the-role-of-body-size-brain-size-and-eye-size-in-visual-acuity
#7
Alberto Corral-López, Maddi Garate-Olaizola, Severine D Buechel, Niclas Kolm, Alexander Kotrschal
Abstract: The visual system is highly variable across species, and such variability is a key factor influencing animal behavior. Variation in the visual system, for instance, can influence the outcome of learning tasks when visual stimuli are used. We illustrate this issue in guppies (Poecilia reticulata) artificially selected for large and small relative brain size with pronounced behavioral differences in learning experiments and mate choice tests. We performed a study of the visual system by quantifying eye size and optomotor response of large-brained and small-brained guppies...
2017: Behavioral Ecology and Sociobiology
https://www.readbyqxmd.com/read/29212065/development-of-the-visual-system-in-a-burrow-nesting-seabird-leach-s-storm-petrel
#8
Mindaugas Mitkus, Gabrielle A Nevitt, Almut Kelber
Little is known about the development of vision in wild birds. It is unknown, for example, whether the ability to see can be predicted by the level of prenatal growth or whether the eyes are open at hatching in a particular species. In this study, we investigated the growth of eyes, the formation of retinal ganglion cell topography, and the appearance of simple, visually guided behaviours in chicks of a small procellariiform seabird, Leach's storm petrel (Oceanodroma leucorhoa). This semi-precocial species, which has a well-developed sense of smell, nests in underground burrows where adults provision chicks for 6-8 weeks in the dark before fledging...
December 7, 2017: Brain, Behavior and Evolution
https://www.readbyqxmd.com/read/29198310/whole-high-quality-light-environment-for-humans-and-plants
#9
Anton Sharakshane
Plants sharing a single light environment on a spaceship with a human being and bearing a decorative function should look as natural and attractive as possible. And consequently they can be illuminated only with white light with a high color rendering index. Can lighting optimized for a human eye be effective and appropriate for plants? Spectrum-based effects have been compared under artificial lighting of plants by high-pressure sodium lamps and general-purpose white LEDs. It has been shown that for the survey sample phytochrome photo-equilibria does not depend significantly on the parameters of white LED light, while the share of phytoactive blue light grows significantly as the color temperature increases...
November 2017: Life Sciences in Space Research
https://www.readbyqxmd.com/read/29197374/prevalence-and-associated-factors-of-strabismus-in-former-preterm-and-full-term-infants-between-4-and-10%C3%A2-years-of-age
#10
Achim Fieß, Ruth Kölb-Keerl, Alexander K Schuster, Markus Knuf, Bernd Kirchhof, Philipp S Muether, Jacqueline Bauer
BACKGROUND: Limited data exist collating most of the associated factors for strabismus in one analysis. The aim of this study was to assess the prevalence of strabismus and to analyse associated factors in former preterm and full-term infants. METHODS: In this cross-sectional study, 239 former preterm infants with gestational age (GA) ≤ 32 weeks and 264 former full-term born infants with GA ≥ 37 weeks underwent detailed ophthalmologic examination in the age of 4-10 years and perinatal data assessment for risk factor analysis...
December 2, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/29195722/autologous-dermis-fat-grafts-as-primary-and-secondary-orbital-transplants-before-rehabilitation-with-artificial-eyes
#11
Sven Holger Baum, Claus Schmeling, Roman Pförtner, Christopher Mohr
OBJECTIVE: The aim of this study was to examine the role of autologous dermis-fat grafts in the reconstruction of orbital soft-tissue defects. PATIENTS: Thirty-six patients (3-84 years) were enrolled in this retrospective study from 2002 to 2014. The dermis-fat graft was primarily transplanted in seven cases, and secondarily in 29 patients. All the patients were evaluated for complications, adequate prosthetic cavity, possibility of artificial eye supply and movement, as well as cosmetic results...
October 26, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/29190383/bionic-vision-social-work-and-community-development-a-research-participant-s-reflections
#12
Dianne Ashworth
This article discusses bionic vision through the author's experiences as Australia's first research participant in an early prototype bionic eye trial. During her two-year participation, she drew on various theoretical perspectives, including critical and community development approaches that not only influence her professional social work perspective, but extend to her personal worldview. In a rapidly emerging biotechnological age, this article contributes a holistic perspective, bringing into focus theory and practice; issues of human experience, human rights, and oppressive relationships; tensions between agency and structure (particularly relating to disability from a social model of disability and the medical model); and practical applications of artificial vision...
November 28, 2017: Health & Social Work
https://www.readbyqxmd.com/read/29189737/novel-artificial-tears-containing-cross-linked-hyaluronic-acid-an-in-vitro-re-epithelialization-study
#13
Arianna Fallacara, Silvia Vertuani, Giacomo Panozzo, Alessandra Pecorelli, Giuseppe Valacchi, Stefano Manfredini
Dry eye syndrome is a common disease which can damage the corneal epithelium. It is treated with eye drops to stimulate tear production and hydrate the corneal surface. The most prescribed artificial tear remedies contain hyaluronic acid (HA), which enhances epithelial wound healing, improving tissue health. To the best of our knowledge, only a few recent studies have investigated cross-linked HA (HA-CL) in eye drops for human applications. This work consists in an in vitro evaluation of the re-epithelialization ability of two different preparations containing a recently synthetized HA cross-linked with urea: 0...
November 30, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29186520/intrapuparial-development-of-sarconesia-chlorogaster-diptera-calliphoridae-for-postmortem-interval-estimation-pmi
#14
J C Flissak, M O Moura
Sarconesia chlorogaster (Wiedemann) (Diptera: Calliphoridae) is an endemic blow fly species of forensic importance in South America, and whose duration of pupal development is about 70% of the total immature development time. Therefore, morphological changes during this stage, if refined, may provide greater accuracy and reliability in the calculation of minimum postmortem interval. Considering the importance of this species, the main objective of this work was to identify and describe temporal intrapuparial morphological changes of S...
November 23, 2017: Journal of Medical Entomology
https://www.readbyqxmd.com/read/29176549/origami-silicon-optoelectronics-for-hemispherical-electronic-eye-systems
#15
Kan Zhang, Yei Hwan Jung, Solomon Mikael, Jung-Hun Seo, Munho Kim, Hongyi Mi, Han Zhou, Zhenyang Xia, Weidong Zhou, Shaoqin Gong, Zhenqiang Ma
Digital image sensors in hemispherical geometries offer unique imaging advantages over their planar counterparts, such as wide field of view and low aberrations. Deforming miniature semiconductor-based sensors with high-spatial resolution into such format is challenging. Here we report a simple origami approach for fabricating single-crystalline silicon-based focal plane arrays and artificial compound eyes that have hemisphere-like structures. Convex isogonal polyhedral concepts allow certain combinations of polygons to fold into spherical formats...
November 24, 2017: Nature Communications
https://www.readbyqxmd.com/read/29167331/spaceflight-induced-intracranial-hypertension-and-visual-impairment-pathophysiology-and-countermeasures
#16
REVIEW
Li-Fan Zhang, Alan R Hargens
Visual impairment intracranial pressure (VIIP) syndrome is considered an unexplained major risk for future long-duration spaceflight. NASA recently redefined this syndrome as Spaceflight-Associated Neuro-ocular Syndrome (SANS). Evidence thus reviewed supports that chronic, mildly elevated intracranial pressure (ICP) in space (as opposed to more variable ICP with posture and activity on Earth) is largely accounted for by loss of hydrostatic pressures and altered hemodynamics in the intracranial circulation and the cerebrospinal fluid system...
January 1, 2018: Physiological Reviews
https://www.readbyqxmd.com/read/29165413/-ophthalmoferon-efficacy-in-the-treatment-of-children-with-chronic-blepharoconjunctivitis
#17
L P Prozornaya, V V Brzheskiy
AIM: To study possibilities of using the medication Ophthalmoferon in the treatment of children with chronic allergic and Demodex blepharoconjunctivitis. MATERIAL AND METHODS: We examined 40 children (80 eyes) aged 3 to 17 years with chronic allergic (group I) and Demodex (group II) blepharoconjunctivitis. Each group was divided into two subgroups ('A' and 'B') respectively based on the treatment regimen used. Subgroup 'A' patients received Ophtalmoferon instillations (four times per day for four weeks) in addition to the standard therapy, whereas subgroup 'B' patients got only basic treatment of blepharoconjunctivitis...
2017: Vestnik Oftalmologii
https://www.readbyqxmd.com/read/29163251/consumer-neuroscience-based-metrics-predict-recall-liking-and-viewing-rates-in-online-advertising
#18
Jaime Guixeres, Enrique Bigné, Jose M Ausín Azofra, Mariano Alcañiz Raya, Adrián Colomer Granero, Félix Fuentes Hurtado, Valery Naranjo Ornedo
The purpose of the present study is to investigate whether the effectiveness of a new ad on digital channels (YouTube) can be predicted by using neural networks and neuroscience-based metrics (brain response, heart rate variability and eye tracking). Neurophysiological records from 35 participants were exposed to 8 relevant TV Super Bowl commercials. Correlations between neurophysiological-based metrics, ad recall, ad liking, the ACE metrix score and the number of views on YouTube during a year were investigated...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/29162791/autologous-artificial-tears-used-for-treatment-of-dry-eye-syndrome-in-patients-with-chronic-graft-versus-host-disease
#19
Jolanta Antoniewicz-Papis, Elżbieta Lachert, Karolina Janik, Magdalena Łętowska
No abstract text is available yet for this article.
October 31, 2017: Polish Archives of Internal Medicine
https://www.readbyqxmd.com/read/29156465/-pseudophacic-additive-lenses
#20
Fritz H Hengerer, Ina Conrad-Hengerer
Implantation of artificial intraocular lenses (IOL) after cataract removal today represents the standard of care in the field of anterior segment surgery. In refractive lens exchange cases the natural lens is replaced by an IOL to correct different types of refractive situations. In the majority of the operations the refractive result is satisfying with only few deviations from target refraction.But daily practice reveals some outliers from the intended corrections with the need for further refractive enhancements, respectively...
November 20, 2017: Klinische Monatsblätter Für Augenheilkunde
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