Visual Comfort in VDT Operation: Physiological Resting States of the Eye.

Taptagaporn, Sasitorn; Saito, Susumu

doi:10.2486/indhealth.31.13

Cited by 41 publications

(10 citation statements)

References 9 publications

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“…56 The influence of visual comfort on eye strain and fatigue has been recognized in research on recommendations of comfortable visual display terminal workstation design – an important aspect of visual ergonomics. 57 This needs to be extended into studies looking at the interplay between the visual and non-visual effects of lighting solutions on human cognitive performance and sleep. The observed better visual comfort under the dayLED condition could very well be due to the rather smoother light spectrum of the dayLED, which also resulted in a better colour rendering (both better CRI and better IES TM-30-15 metrics).…”

Section: Discussionmentioning

confidence: 99%

Effect of daylight LED on visual comfort, melatonin, mood, waking performance and sleep

Cajochen

Freyburger

Basishvili

et al. 2019

Lighting Research & Technology

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LED *Shared senior authors. light sources have a discontinuous light spectrum with a prominent ‘blue’ peak between 450 and 470 nm that influences non-image forming responses in humans. We tested an LED lighting solution mimicking a daylight spectrum on visual comfort, circadian physiology, daytime alertness, mood, cognitive performance and sleep. Fifteen young males twice spent 49 hours in the laboratory under a conventional-LED and under a daylight-LED condition in a balanced cross over design flanked by a baseline and a post-light exposure night. Despite different light spectra, the photopic lux and the correlated colour temperature of the lighting were the same for both LEDs. The colour rendering index and the melanopic strength were 25.3% and 21%, respectively, higher for the daylight LED than the conventional LED. The volunteers had better visual comfort, felt more alert and happier in the morning and evening under daylight LED than conventional LED, while the diurnal melatonin profile, psychomotor vigilance and working memory performance were not significantly different. Delta EEG activity (0.75–4.5 Hz) was significantly higher after daylight-LED than conventional-LED exposure during the post-light exposure night. We have evidence that a daylight-LED solution has beneficial effects on visual comfort, daytime alertness, mood and sleep intensity in healthy volunteers.

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Section: Discussionmentioning

confidence: 99%

Effect of daylight LED on visual comfort, melatonin, mood, waking performance and sleep

Cajochen

Freyburger

Basishvili

et al. 2019

Lighting Research & Technology

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“…Chair design has the potential to influence viewing angle and distance. Recommended optimum viewing ranges vary from 50 to 100 cm (Taptagaporn and Saito, 1993;Taptagaporn et al, 1995;Jaschinski et al, 1998). Recent studies suggest the optimum distance is linked to the user's vision system and is best chosen by the worker (Jainta and Jaschinski, 2002).…”

Section: Discussionmentioning

confidence: 99%

A field intervention examining the impact of an office ergonomics training and a highly adjustable chair on visual symptoms in a public sector organization

Amick

Menéndez

Bazzani³

et al. 2012

Applied Ergonomics

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Objective-Examine the effect of a multi-component office ergonomics intervention on visual symptom reductions.Methods-Office workers were assigned to either a group receiving a highly adjustable chair with office ergonomics training (CWT), a training-only group (TO) or a control group (C). A work environment and health questionnaire was administered 2 and 1 month(s) pre-intervention and 3, 6, and 12 months post-intervention. Multi-level statistical models tested hypotheses.Results-The CWT intervention lowered daily visual symptoms (p < 0.01) post-intervention. The TO group did not significantly differ from the control group. The CWT group differed significantly from the TO group (p = 0.01) post-intervention. Conclusion-Workerswho received a highly adjustable chair and office ergonomics training had reduced visual symptoms and the effect was maintained through twelve months postintervention. The lack of a training-only group effect supports implementing training in conjunction with the highly adjustable chair to reduce visual symptoms.

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“…Taptagaporn 12) and Sotoyama 13) , having identified upward gaze as a source of extra physical strain which in turn causes pain and dryness in the eyes, recommended the use of heightadjustable desks and chairs that allow children to assume higher postures and look down on the screen.…”

Section: Discussionmentioning

confidence: 99%

An Ergonomic Questionnaire Survey on the Use of Computers in Schools.

Sotoyama

Bergqvist²,

Jonai³

et al. 2002

INDUSTRIAL HEALTH

Self Cite

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A questionnaire was sent out to elementary, junior high and high schools in Yokohama and Kawasaki Cities from January to March 1998 regarding the use of personal computers by pupils and students. The survey included the questions that asked how often and in what environment computers are used, whether any instructions are given as to their use, children's working posture, and the effect on health. The results show that most schools are slow to develop instructive programs from the environmental or ergonomic point of view. So far there are not many children who complain of any serious symptoms such as pain in the neck, head or shoulders, but a future increase in the number of classes which involve computing, as well as the widespread popularity of home computers, will surely arouse a legitimate concern about the health of pupils and students, since they will spend more and more time operating the devices. An effective way to anticipate the problem is to provide young students with adequate knowledge of easy-on-body usage and environmental design, and now there is an urgent need for specific guidelines to protect them.

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Visual Comfort in VDT Operation: Physiological Resting States of the Eye.

Cited by 41 publications

References 9 publications

Effect of daylight LED on visual comfort, melatonin, mood, waking performance and sleep

Effect of daylight LED on visual comfort, melatonin, mood, waking performance and sleep

A field intervention examining the impact of an office ergonomics training and a highly adjustable chair on visual symptoms in a public sector organization

An Ergonomic Questionnaire Survey on the Use of Computers in Schools.

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