Temat: binocular vision - Prolib Integro

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Tytuł:: Binocular summation evaluated by early and late visual evoked potentials
Autorzy:: Czaińska, M.
Przekoracka-Krawczyk, A.
Naskręcki, R.
van der Lubbe, R.
Tematy:: binocular summation
binocular vision
visual evoked potentials; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/174864.pdf Link otwiera się w nowym oknie
Opis:: The visual evoked potential technique makes it possible to explore the visual system with a high temporal resolution, thereby providing information about different phases of binocular integration. The aim of the study was to characterize the amplitude, latency and scalp distribution of pattern-reversal gratings visual evoked potentials related to binocular viewing. 12 adult participants without any pathology of the visual system were examined by electroencephalography (EEG), with three viewing conditions: the dominant eye, non-dominant eye, and both eyes. They were tested with reversed checkerboard patterns presented with a frequency of 1.02 Hz. The amplitudes of visual evoked potentials were calculated to detect the effect of binocular integration. The strongest binocular summation was observed on the N75 component. P100 component was also affected by binocular viewing, mainly above parieto-occipital cortex. In the later time window binocular summation was reflected in changes in amplitude of N145 component over the right parieto-occipital region. The obtained results suggest that binocular summation is not limited to occipital cortex as its influence was also observed above parieto-occipital regions. Changes in amplitude of N75 component looks to be a good predictor of binocular summation.
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Awareness among medical students regarding the binocularity level in the course of future specialty choice
Autorzy:: Fedoryak, Xeniya
Simiera, Justyna
Loba, Piotr
Tematy:: medical students
binocular vision
vision standards
stereoacuity
medical specialty
occupational requirements; Pokaż więcej
Wydawca:: Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Powiązania:: https://bibliotekanauki.pl/articles/2085446.pdf Link otwiera się w nowym oknie
Opis:: BackgroundVision standards exist in many occupations with particular reference to medical science. The presence of a sufficient level of binocular vision is especially important in surgical specialty to perform visually demanding procedures. The purpose of this study was to reveal the level of awareness of one’s binocular status among medical students, and the significance of having binocular vision in terms of specialty choice.Material and Methodsself-constructed questionnaire was given to all subjects enrolled in the study. The first group comprised 53 students from the second and third year of the Medical University of Lodz, who then underwent an ophthalmological examination with binocularity assessment. The second group included 57 students of the last years of the Medical Faculty, who did the same survey and outlined how the ophthalmology course improved their knowledge of stereoacuity and vision requirements for the chosen specialty. Statistical analysis was performed using Person’s χ² test.ResultsOverall, 32% (N = 17) of the students from the first group and 84% (N = 48) from the second group stated to be familiar with the term “binocularity” and its importance in performing surgical procedures. The awareness of the existing occupational contraindications related to low visual acuity and binocularity was declared by 16% (N = 9) and 54% (N = 31) of the subjects included in each group, respectively. University lectures were indicated as the main source of knowledge by 28% (N = 15) of the individuals from the first group and by 59% (N = 39) from the second group. The ophthalmology course was considered to be sufficiently covering the basics needed for the future doctor by 34 resident physicians (60%).ConclusionsThe medical students’ awareness of their own binocular status appears low. There is a strong need for implementing at least some quality standards for visual assessment to decide if a given student has an adequate eye function to participate in surgical procedures.
Dostawca treści:: Biblioteka Nauki

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Tytuł:: The influence of high additions in multifocal contact lenses for myopia control on binocular vision
Autorzy:: Kropacz-Sobkowiak, Sylwia
Przekoracka-Krawczyk, Anna
Michalski, Andrzej
Olszewski, Jan
Wasilewska, Klaudia
Tematy:: multifocal contact lenses
myopia
myopia control
binocular vision
phoria; Pokaż więcej
Wydawca:: Medical Education
Powiązania:: https://bibliotekanauki.pl/articles/56308707.pdf Link otwiera się w nowym oknie
Opis:: Methods: A prospective randomized, double-blind study including 24 subjects aged between 18 and 36 years. Subjects were divided into two groups. The first group wore multifocal soft contact lenses (MFSCLs) with a 3.0 mm central zone diameter, while the second group wore contact lenses with 4.5 mm central zones. Each subject was fitted with two MFSCLs: one with +2.00 D and the other with +4.00 D peripheral addition power and, additionally, with plano single vision contact lenses (SVCLs). Phoria at a distance and near, distance and near vergence ranges, vergence facility at near, stereopsis at near, and fixation disparity at near were measured in each study lens type. Results: No significant influence of addition on distance phoria was found in either group (p = 0.446 and p = 0.317, for 3 mm and 4.5 mm central zone diameter, respectively). Additionally, no significant difference was observed for any MFSCLs and SVCLs in near phoria (p = 0.320), near vergence facility (p = 0.197), or near fixation disparity (p = 0.203). A decline in fusional vergence ranges at a distance in the base-out direction was noted in subjects wearing +4.00 D addition compared to +2.00 D addition (p = 0.002) and plano lenses (p = 0.014). Both additions reduced fusional vergence ranges at near the base out (p = 0.020) and shifted vergence ranges more in the exophoria base in directions (p = 0.014). Conclusions: The study showed that MFSCLs with high additional power in the periphery have only a marginal impact on the binocular functions.
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Laser vision correction and binocular vision - case reports
Autorzy:: Truszkowski, Wiktor
Janiszewska-Bil, Dominika
Czarnota, Barbara
Wierzbowska, Joanna
Tematy:: laser vision correction
binocular vision
strabismus
visual defects and correction
optometry; Pokaż więcej
Wydawca:: Medical Education
Powiązania:: https://bibliotekanauki.pl/articles/61650477.pdf Link otwiera się w nowym oknie
Opis:: Laser vision correction (LVC) is the removal of refractive errors, by changing the geometry of the cornea. It doesn’t directly affect binocular vision. However, the condition of the patient’s binocular vision is a very important. That affects the quality of life, which also indirectly translates into the patient’s satisfaction with the LVC procedure. Based on the presented cases, this article proves how important it is to examine binocular vision before laser vision correction. The influence of the prismatic effect of spectacle lenses on the control of binocular vision and the risk of strabismus decompensation, which is most often associated with double vision. The described cases are people with problems with binocular vision. The article includes methods of treatment (contact lens test, vision therapy) to check and eliminate the above-mentioned problem.
Dostawca treści:: Biblioteka Nauki

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Tytuł:: A super depth of field height measurement based on local disparity
Autorzy:: Cui, L.
Liu, Y.
Yu, M.
Jiang, G.
Fan, S.
Wang, Y.
Tematy:: microscopes
binocular vision
local disparity map
depth of field (DOF)
height measurement; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/173522.pdf Link otwiera się w nowym oknie
Opis:: A super depth of field height measurement method is proposed to measure the object height with the optical stereoscopic microscope. The quasi-Euclidean epipolar rectification algorithm is utilized on the original stereoimage to obtain rectified stereoimages and calibrate two camera parameters. Then, feature points are obtained by the SURF (speed up robust feature) algorithm and their corresponding disparities are calculated. The disparity-depth of field curve is fitted by combining the step height values of a stepper motor. Moreover, through local disparity value got from feature points on the object, the relative shift height is calculated through regression analysis. Finally, according to binocular vision geometry, the thickness of the object can be calculated. Experimental results show that the measurement error in Z direction is from 1.51% to 7.71%, which indicates that the proposed method is able to measure the height of a microobject beyond depth of field within a tolerant error.
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Stereovision system with active vergence and gaze control mechanism
System stereowizyjny z aktywnym mechanizmem zmiany kąta widzenia oraz zbieżności osi optycznych kamer
Autorzy:: Szewczyk, P.
Tematy:: system stereowizyjny
widzenie dwuoczne
stereovision system
vergence and gaze control mechanism
binocular vision; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/153699.pdf Link otwiera się w nowym oknie
Opis:: The paper describes a prototypical stereovision system with active vergence and gaze control mechanism. The model and mechanical construction enable the accurate positioning of cameras. Increase in the measurement resolution of the binocular vergence angle in the selected range of depth is specified. The vergence control mechanism uses a kinematic chain with 3-DOF joints. In order to obtain a linear characteristic of the measurement system, there was performed the optimisation process of the kinematic chain parameters.
W artykule przedstawiony jest opis prototypowego układu stereo-wizyjnego z aktywnym systemem zmiany kąta widzenia oraz zbieżności osi optycznych kamer. Zmiana kąta zbieżności osi optycznych kamer wraz z obrotem głowicy umożliwia koncentrację systemu na pewnym, dowolnie wybranym obiekcie w rzeczywistej przestrzeni trójwymiarowej. Prowadzi do nałożenia pól widzenia obu kamer i niewielkich wartości dysparycji bliskich zeru dla wybranego, śledzonego obiektu umożliwiając szybką segmentację obrazu. Zaprezentowano model oraz konstrukcję mechaniczną umożliwiającą dokładne pozycjonowanie kamer, a także zwiększenie rozdzielczości pomiarowej kąta zbieżności w wybranym przedziale mierzonej głębi. W mechanizmie kontroli zbieżności osi optycznych kamer zastosowano łańcuch kinematyczny wykorzystujący złącza o trzech stopniach swobody, a następnie dokonano optymalizacji parametrów tego łańcucha tak, aby zapewnić możliwie linową charakterystykę przetwarzania układu pomiarowego.
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Design and evaluation of a needle tip measurement system based on binocular vision
Autorzy:: Lin, Yuyang
Shi, Yunlai
Zhang, Jun
Wang, Fugang
Sun, Haichao
Tematy:: needle tip measurement
binocular vision system
measurement capability analysis
non-contact optical positioning; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/220501.pdf Link otwiera się w nowym oknie
Opis:: The precise location of the needle tip is critical in robot-assisted needle-based percutaneous interventions. An automatic needle tip measuring system based on binocular vision technology with the advantages of non-contact, excellent accuracy and high stability is designed and evaluated. First the measurement requirements of the prostate intervention robot are introduced. A laser interferometer is used as the reference for measuring the position of the needle tip whose relative position variation is described as the needle tip distance in the time domain. The parameters of the binocular cameras are obtained by Zhang’s calibration method. Then a robust needle tip extraction algorithm is specially designed to detect the pixel coordinates of the needle tip without installing the marked points. Once the binocular cameras have completed the stereo matching, the 3D coordinates of the needle tip are estimated. The measurement capability analysis (MCA) is used to evaluate the performance of the proposed system. The accuracy of the system can be controlled within 0.3621 mm. The agreement analysis is conducted by the Bland-Altman analysis, and the Pearson correlation coefficient is 0.999847. The P/T ratio value is 16.42% in the repeatability analysis. The results indicate that the accuracy and stability of the binocular vision needle tip measuring system are adequate to meet the requirement for the needle tip measurement in percutaneous interventions.
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Visual function after bilateral implantation of multifocal versus monofocal IOLs in children below 5 years of age
Autorzy:: Prost, Marek E.
Tematy:: binocular vision
distance and near visual acuity
monofocal IOLs
multifocal IOLs
pediatric cataract surgery
stereopsis; Pokaż więcej
Wydawca:: Medical Education
Powiązania:: https://bibliotekanauki.pl/articles/1927563.pdf Link otwiera się w nowym oknie
Opis:: Background: Since pediatric ophthalmologists still prefer to implant monofocal IOL and experience with multifocal IOL implantation in children is limited. Therefore, the aim of the study was to evaluate visual results after bilateral implantation of multifocal versus monofocal IOLs in children aged 1–5 years with congenital cataract. Methods: Children between 1 and 5 years of age with bilateral cataract who underwent cataract removal implantation of an multifocal IOL – Lentis Mplusx , Oculentis GmbH, Germany (55 children – group A) or monofocal IOL – C-flex Aspheric Monofocal, Rayner Intraocular Lenses Limited, UK (55 children – group B). The distance corrected visual acuity, distance corrected near visual acuity, binocular function using the Worth 4-dot test, stereopsis using the TNO test were evaluated. Results: At the final follow-up visit after 12 months, the mean best corrected distant visual acuity was not significantly different between groups A and B but the best corrected near visual acuity, binocular vision and stereopsis were significantly better in patients from group A as compared to group B. Conclusion: Implantation of a multifocal IOL in children aged 1–5 years with bilateral cataract provides a better level of near vision and considerably improves the development of stereopsis in comparison with children after monofocal IOL implantation.
Dostawca treści:: Biblioteka Nauki

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Tytuł:: „Estetyka możliwości” w jej konkretyzowanym otwarciu na efekt „widzenia binokularnego” ironicznego alegoryka
„AESTHETICS OF POTENTIALITY” IN ITS INSTANTIATED OPENING TO THE EFFECT OF „BINOCULAR VISION” OF AN IRONIC ALLEGORIST
Autorzy:: Muszyńska, Małgorzata
Tematy:: założenia
ironiczny alegoryk
estetyczne możliwości
empatia epistemologiczna
sublimacja „binokularne widzenie”
preconception
ironic allegorist
aesthetics capabilities
binocular vision
epistemological empathy
sublimation; Pokaż więcej
Wydawca:: Kujawsko-Pomorska Szkoła Wyższa w Bydgoszczy
Powiązania:: https://bibliotekanauki.pl/articles/579386.pdf Link otwiera się w nowym oknie
Opis:: Artykuł jest syntezą założeń, które ustanawiają pryzmat, przez który autorka zamierza przeprowadzić analizę jakościową danych uzyskanych w jej badaniach edukacyjnych nad studentami pedagogiki, którzy występowali jako ironiczni alegorycy. Innymi słowy, badania te wpisują się w „estetykę możliwości”, konkretyzowaną w terminach krytycznego myślenia edukatora, jako otwarcie na: (1) efekty epistemologicznej empatii, do której prowadzą teksty kulturowe mające moc dekonstrukcyjną, czyli poetyckie figury dotyczące „negatywnych możliwości” (2) efekt znany w psychoanalizie jako „widzenie binokularne”, które głównie prowadzi do sublimacji.
The article is a synthesis of preconceptions, which constitute the prism through which the author intended to perform a qualitative analysis of data obtained in her educational research studies with students of pedagogy, who acted as ironic allegorists. In other words, these investigations fit in the „aesthetics of potentiality” which is instantiated in terms of critical thinking of an educator, as the opening to: (i) the effects of epistemological empathy, to which lead cultural texts having the deconstructive power - i.e., the poetic figures about the „negative possibilities”; (ii) the effect known in the psychoanalysis as the „binocular vision” which leads primarily to the sublimation.
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Alegoria w powieściach W. Goldinga jako perspektywa rozwoju etycznego według E. Honinga
Allegory and irony in the novels of William Golding as the perspective of ethical development according to E. Honing and L.L. Dickson
Autorzy:: Muszyńska, Małgorzata
Tematy:: alegoria
ironia
widzenie binokularne
epistemologia poznawcza
sublimacja
dwoistość
dobra godzina analityczna.
allegory
irony
binocular vision
cognitive epistemology
sublimation
duality
good analytic; Pokaż więcej
Wydawca:: Uniwersytet Humanistyczno-Przyrodniczy im. Jana Długosza w Częstochowie. Wydawnictwo Uczelniane
Powiązania:: https://bibliotekanauki.pl/articles/629255.pdf Link otwiera się w nowym oknie
Opis:: The author attempts to describe the inspiration that comes from several concepts of various authors who are literary critics (E. Honing, L.L. Dickson), the researchers studying metaphors (P. Crisp) and studying creativity (G. Rose) and psychoanalysts who indicate educational gains, resulting from a “good analytic hour” in which the “binocular vision” occurs, coming from the allegorical “cognitive epistemology” and leading to sublimation conceived as a higher state of understanding of itself and the reality (H. Loewald, J. Miller). Among the many concepts of allegories presented earlier in her book “Allegories in aesthetic spaces of pedagogy. Duality in expositions of the ironic allegorist – qualitativeresearch” she chooses, for the purpose of this article only a single one. It is the concept of thinking about allegorical interpretation of works of William Golding.
Autorka artykułu podejmuje próbę opisania inspiracji dla edukacji etycznej, jaka płynie z kilku koncepcji, których autorami są literaturoznawcy (E. Honing, L.L. Dickson), badacze metafor (P. Crisp) i twórczości (G. Rose) oraz psychoanalitycy, wskazujący edukacji zysk, jaki może spowodować „dobra godzina analityczna”, w której pojawia się „widzenie binokularne”, wychodzące od alegorycznej „królewskiej drogi do empatii epistemologicznej” (A. Margulies) i prowadzące do sublimacji pojmowanej jako wyższy stan rozumienia siebie i rzeczywistości (H. Loewald, J. Miller). Spośród wielu koncepcji alegorii, które przedstawiła w swojej książce pt. Alegorie w estetycznych przestrzeniach pedagogiki. Dwoistość w ekspozycjach ironicznego alegoryka – badania jakościowe wybiera jako przykład, dla potrzeb tego artykułu, tylko jedną. Jest nią koncepcja myślenia o sposobie interpretacji alegorycznych dzieł W. Goldinga.
Dostawca treści:: Biblioteka Nauki

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