Wyniki wyszukiwania - BazTech

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Problemy wzrokowe studentów w czasie zdalnego nauczania

Chojnacka Justyna, Jóźwik Agnieszka

Optyka

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2021

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Nr 4

50--52

PL

Wprowadzenie zdalnego nauczania w wyniku pandemii COVID-19 na początku semestru letniego 2020 roku zmusiło studentów do długotrwałej pracy przed ekranem komputera, powodując u nich szereg objawów świadczących o wystąpieniu cyfrowego zmęczenia oczu. W ramach pracy przeprowadzono analizę subiektywnej oceny stanu wzroku podczas nauczania w czasie pandemii. W związku z tym została przeprowadzona ankieta on-line, zawierająca pytania dotyczące czasu spędzanego przed ekranem komputera, samopoczucia ankietowanych oraz symptomów występujących ze strony układu wzrokowego, a związanych z patrzeniem do bliży, dali oraz postrzeganiem kolorów. W ankiecie zostały także uwzględnione dodatkowe pytania dla użytkowników soczewek kontaktowych.

EN

The spread of the COVID-19 pandemic in the spring of 2020 forced students to work long hours in front of the computer during on-line learning, causing them a number of symptoms connected with a digital eye strain. As part of the study, an analysis of the subjective assessment of the visual condition during education during a pandemic was carried out. Therefore, an on-line questionnaire was prepared. It contained questions like the time spent in front of the computer screen, the well-being of the respondents and the symptoms of the visual system related to near vision, far vision and colour perception. Additional questions for contact lens wearers were also included in the test.

2

Stereoscopic image visual perception

Fornalczyk K., Napieralski P., Szajerman D., Wojciechowski A.

International Journal of Microelectronics and Computer Science

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2015

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Vol. 6, nr 1

15--22

EN

Stereoscopic films and interactive presentations are extensively popularized whereas their perceived quality still dissatisfies viewers. The reasons are shared between hardware inconsistencies and stereo image producers unawareness concerning factors influencing depth perception quality. This paper reviews aspects influencing 3D image perception visual comfort, presents visual comfort estimation methods and suggests how to measure image perception quality. It also comprises results of researches conducted on dedicated CinemaVision Movie Diagnostics work stand.

3

Effects of Polyphenol on Visual Fatigue Caused by VDT Work

Yoshihara A., Yamanaka K., Kawakami M.

International Journal of Occupational Safety and Ergonomics

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2009

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Vol. 15, No. 3

339--343

EN

Visual fatigue of VDT (visual display terminal) operators poses a serious problem for corporations where VDT work is a major part of operations. In this study, an investigation in a corporation was carried out to examine the effect of polyphenol on recovery from visual fatigue of the visual function caused by working at a VDT. Three kinds of parameters were used for evaluating the effect of polyphenol. As a subjective evaluation, the first was a questionnaire to ascertain subjective feelings of fatigue. As aspects of a physiological evaluation, the second and third parameters were the accommodative function and the flicker value.

4

Inteligentne systemy sterowania oświetleniem a zmęczenie wzroku użytkowników

Wolska A.

Przegląd Elektrotechniczny

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2007

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R. 83, nr 5

97-99

PL

Jedną z podstawowych cech inteligentnych systemów sterowania oświetleniem jest utrzymywanie stałego poziomu natężenia oświetlenia będącego sumą światła dziennego oraz elektrycznego. Celem badań było określenie zmęczenia wzroku i samopoczucia pracowników biurowych obsługujących komputer przy różnych systemach oświetlenia zarządzanych przez cyfrowy system sterowania oświetleniem (DALI). Badania wykonane były w warunkach laboratoryjnych dla trzech systemów oświetleniowych.

EN

One of the main features of new intelligent lighting control systems is to maintain the desired level of illuminance from the mixture of daylight and artificial lighting. The purpose of the study was to define visual fatigue and well-being of VDT operators under an automatic operation of digital light control system (DALI). Experiments were carried out in laboratory conditions for three different lighting systems which ensured compliance with lighting requirements and created different luminous environments.

5

Visual Strain and Lighting Preferences of VDT Users Under Different Lighting Systems

Wolska A.

International Journal of Occupational Safety and Ergonomics

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2003

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Vol. 9, No. 4

431--440

EN

Lighting influences users’ visual strain and well-being. Therefore creating lighting that ensures visual work conditions do not results in visual fatigue is a preventive activity. The aim of the study was to model different lighting systems for visual display terminal (VDT) work and to determine their influence on users’ visual strain and preferences. The results of the study showed that visual fatigue was lowest for indirect and compound lighting systems. On the other hand, in general, direct lighting realized by “dark-light” luminaires was the most preferred lighting system. Some interesting differences related to age, gender, and VDT work experience were found. On the basis of the obtained results lighting designers can be provided with some guidance.

6

Luminance of the Surround and Visual Fatigue of VDT Operators

Wolska A., Swituta M.

International Journal of Occupational Safety and Ergonomics

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1999

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Vol. 5, No. 4

553--580

EN

Luminance distribution in the visual field is considered as one of causal factors with a significant influence on visual fatigue, especially for intensive and extended Video Display Terminal (VDT) work. The aim of the study was to define visual fatigue of VDT operators for different values of surrounding luminance. Experiments were carried out in laboratory conditions under 3 lighting conditions. Only 1 lighting parameter - the luminance of the wall behind the display (surrounding luminance) - changed. Visual fatigue was measured both by a subjective evaluation of different visual complaints (asthenopic symptoms) and by objective measurements of changes in the following visual functions: accommodation, convergence, habitual horizontal phoria, critical fusional frequency (CFF), and visual acuity. The same experiments were done for CRT (Cathode Ray Tube) and LCD TFT (Liquid Crystal Display with Thin Film Transistor) screens. The results of the study have shown that there was no significant influence of the value of surrounding luminance on the asthenopic symptoms for either type of screen. A general tendency towards bigger visual complaints for LCD TFT than for CRT participants was found. An objective evaluation of visual fatigue demonstrated a tendency towards bigger changes in visual functions with an increase of surrounding luminance for both screens. Statistical analysis of the results has shown that surrounding luminance influences significantly the reduction of the accommodation amplitude (significance level < .05).