• Proceedings of the Korean Operations and Management Science Society Conference
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• 2000.04a
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• pp.577-580
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• 2000

종합병원에서는 많은 환자들의 데이터를 효과적으로 관리하기 위해 각종 자료를 전 산화하고 있으며, 그곳에서 근무하는 간호사들은 VDT (Visual Display Terminal) 앞에서 작업시간의 대부분을 보내야만 한다. 간호사들의 요통 유병률이 타 직종에 비해 높은 편이며, 업무와 관련해서 경험한 요통이 간과되는 경향이 있고, 사고보고를 하지 않는 경우가 많아서 실제의 요통 발생률은 보고된 것보다 더 높을 수 있다［1］는 연구결과가 발표된 바 있으며, 이러한 이유에는 여러 원인이 있겠으나, 그 중에서 특히 VDT작업을 하는 간호사들과 작업환경과의 관계를 규명해 보고자 서울 지역의 일부 종합병원 VDT(Visual Display Terminal) 작업 간호사들을 대상으로 실태조사를 하였다. 본 연구의 목적은 VDT 작업 간호사들의 설문지 응답과 직무분석 그리고 작업자세와 작업환경조건 등을 고려하여 VDT증후군에 대한 위험요인을 파악하고, VDT 관련 직업병 예방대책을 마련하고자 하였다. 설문지 분석결과 종합병원 간호사들의 근무환경 및 업무활동과 통증발생 결과간에 관련성이 있음을 알 수 있었다. RULA 프로그램 분석결과인 Level 5가 나왔으며, 이는 3단계 위험수준을 가리키는 것으로 곧 작업환경을 바꾸어야 하는 것으로 나타났다.

• Journal of Preventive Medicine and Public Health
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• v.30 no.3 s.58
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• pp.599-608
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• 1997

We studied on change of lens accommodation and pupil light reflex caused by VDT work in six women and compared them with those of other office works. The results were as follows. 1. In VDT work the accommodation contraction velocity decreased during the first 2-hr VDT task, then recovered markedly by the end of the one-hour lunch break, and decreased again by the end of the 2nd 2-hr VDT task. Changes of relaxation velocity showed similar pattern although it was less typical than that of contraction velocity 2. There was no marked change in accommodation contraction velocity and amplitude of accommodation in general office work and near-distance office work, and in the near-distance office work accommodation relaxation velocity decreased according to work load without recovery after lunch break. 3. Initial pupil diameter, initial pupil area of light reflex decreased significantly during VDT task only in VDT work and didn't recover after lunch break. These results suggest possibility that changes of accommodation contraction velocity, accommodation relaxation velocity, near point distance, and pupil diameter and area are useful in evaluating characteristics of VDT work. For this, more research adjusted individual differences, circadian rhythm, emotional stress needs.

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.4 no.1
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• pp.31-40
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• 1990

Poor quality and lower levels of lighting can produce severe problems in visual environment including glare, veiling reflections and contrast. This study aims to evaluate the lighting environment around VDTs. For the purpose, brightness contrast on screen, Reyboard, and document, and their illumination were measured and compared to German Standard. The lighting environment of two offices untilizing VDTs were significantly different according to the daylight direction; the side and the frontward.

• Journal of Korean Ophthalmic Optics Society
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• v.1 no.2
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• pp.93-97
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• 1996

Recently, the directly or indirectly examples of VDT syndrome have shown through various media. This research was presenting a standard and a model to administer VDT working environment and the workers that can prevent the dmage obtained from VDT. As a result, the VDT syndrome was affected working environment, a mental state of workers and directing stimulation by a terminal. Thereby, It is investigated that the change of productivity come to about 20 percent by the Federal Express. The influence of VDT syndrome affect not only worker himself but also the management of organization. From research I could find(investigated) that VDT syndrome has an effect on the combination not only direct stimulation by terminal butalso working environment and a mental state of workers.

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.4 no.3
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• pp.26-36
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• 1990

Poor quality and lower levels of lighting can produce severe problems in visual environment including glare, veiling reflections and contrast. This study aims to evaluate the lighting environment around VDTs. For the purpose, brightness contrast on screen, Reyboaed, and document, and their illumination were measured and compared to German Standard. The lighting environment of two offices untilizing VDTs were significantly different according to the daylight direction; the side and the frontward.

• Journal of Korean Ophthalmic Optics Society
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• v.7 no.2
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• pp.33-39
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• 2002

The purpose of this study is to evaluate the effects of continuing work on VDT(video display terminal). Therefore, we examined visual fatigue by a questionnaire and measured frequency of blinking, tear film break-up time(BUT), height of palpebral fissure, visual acuity, refraction with retinoscopy and accommodation before and after two hour long VDT work. For the ocular symptoms, the greatest number was tired eyes accounting for 34%. In the visual symptoms, blurred vision was the highest rate of 83% and in case of systemic symptoms, shoulder pain was 38% marked top ranking but other symptoms were also distributed similar rate. The frequency of blinking during VDT work decreased significantly comparing with the one at rest. The average frequency of blinking is 8/min during VDT work and 22/min at rest. The BUT measured immediately after VDT work decreased much more than in the resting state. The average BUT was 7sec immediately after VDT work and 12sec at rest. The height of palpebral fissure during VDT work increased significantly comparing with the value at rest. The average height of palpebral fissure was 7.69mm at rest and 9.04mm during VDT work. The average visual acuity decreased almost 9.5% from 0.63 to 0.57, but refraction with retinoscopy increased about 0.28D to the direction of myopic shift. The amplitude of accommodation decreased approximately 1.49D from 7.98D to 6.49D and this resulted from the prolongation of near point of accommodation. Near point of convergence also was prolongated from 9.45cm to 10.30cm after VDT work.

• Journal of Korean Ophthalmic Optics Society
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• v.17 no.3
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• pp.285-291
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• 2012

Purpose: This study was conducted to research any effect on visual function related to accommodation by VDT work. Methods: The refraction power, accommodative lag, accommodative facility, relative accommodation, amplitude of accommodation and blink rate were measured before and after VDT work for 2 hours on 48 university students (16 males and 32 females), without abnormal accommodative function and systemic and ocular disease, who had never undergone corrective eye surgery. All examinations were performed with distant refraction, and a survey was conducted on the items related to subjective symptoms of VDT syndrome. Results: After 2 hours of VDT work, refractive power increased by 0.23 D, the amount of change in accommodative lag were $0.17{\pm}0.42D$ in the right eye and $0.23{\pm}0.47D$ in the left eye (t=2.26, p=0.03). There were statistically significant differences. Both the accommodative facility and relative accommodation and amplitude of accommodation were decreased after work. However, blink rate were increased. After VDT work, 33.4% of the subjects showed subjective symptoms of asthenopia and 33.3% of them showed shoulder pain. Conclusions: As a result, the accommodative lag increased in response to the two hours of VDT work, and overall accommodative functions were decreased. In addition, as symptoms of providing visual strain, asthenopia showed the most prominent subjective symptoms.

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 2001.11a
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• pp.94-98
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• 2001

최근 급속한 사무자동화와 함께 컴퓨터의 사용이 보편화되어 가고 있다. 또한, PC보급이 급격하게 증가함에 따라 직장에서뿐만 아니라 가정에서도 누구나 쉽게 컴퓨터 작업을 할 수 있게 되었다. 이에 따라 컴퓨터 등 VDT(Visual Display Terminal)를 장시간 들여다보며 작업을 하는 경우가 늘어나게 되고, VDT작업으로 인한 피로, 시각장애, 경견완장애(목, 어깨 및 손목질환), 요통 등과 같은 새로운 재해를 유발할 가능성이 높아지게 되었다.(중략)

• Proceedings of the ESK Conference
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• 1996.04a
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• pp.191-199
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• 1996

단순 VDT 작업에 의한 인간의 시각정보처리에의 영향을 살펴보기 위하여 특히 서로 다른 model에 대한 정보처리에의 영향을 조사하였다. 피험자는 시각감시 작업과 데이타입력작업을 각각 50분씩 2회 수행하였고 서로 다른 model에 대한 영향을 살펴보기 위해 적업 전, 중 ,후에 걸쳐 MD 및 PD 방법에 의한 과제가 실 시되었다. 실험결과, 단순 VDT 작업이라고 하더라도 작업 수행 내용의 차이에 따라 서로 다른 model에 대한 정보처리에의 영향이 다르게 나타날 수도 있다는 점이 시사되었다.

• Journal of the Ergonomics Society of Korea
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• v.10 no.2
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• pp.3-13
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• 1991

As the VDT work constrains work postures because of its work characteristics. VDT worksta- tions should be properly designed so as to be fitted to various types of physical conditions of op- erators. Therefore, in this study, the preferred settings of VDT wrokstation dimensions of operators. Therefore, in this study, the preferred settings of VDT workstation dimensions and work postures were studied in order to determine the appropriate dimensions and the work postures for VDT operators which will alleviate the musculoskeletal troubles or visual fatigue. The scpoe of the study is as follows. 1. Measurement and analysis of the preferred settings of the height of workstation, keyboard, seat, and screen among the experienced VDT operators. 2. Anaysis of the relationship between the preferred settings of workstation height and the seat height control among the experienced VDT operators. 3. Analysis of the work postures of the experienced VDT operators.