Effect of Visual Display Unit Use on Blink Rate and Tear Stability

Patel, Sudi; Henderson, Robert J.; Bradley, Lynette; Galloway, B; Hunter, Lisa L.

doi:10.1097/00006324-199111000-00010

Cited by 204 publications

(141 citation statements)

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“…6 Our finding of a correlation between work at VDT and ocular discomfort symptoms in MGD subjects suggests that this feature should be taken into consideration when occupational health practitioners encounter ocular complaints among VDT operators. …”

Section: Discussionmentioning

confidence: 70%

“…4 This finding is supported by several surveys which suggest that VDT users frequently suffer from work-related symptoms of ocular discomfort and show ocular surface signs such as corneal abnormalities or instability of the precorneal tear film. [5][6][7][8] Although much has been written about both MGD and ocular discomfort associated with VDT use, there are no published data about the relationship between MGD and such ocular symptoms arising in the course of VDT use.…”

Section: Introductionmentioning

confidence: 99%

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Meibomian gland dysfunction and ocular discomfort in video display terminal workers

Fenga

Aragona

Cacciola

et al. 2007

Eye

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Purpose Meibomian gland dysfunction (MGD) is one of the most common ocular disorders encountered in clinical practice. The clinical manifestations of MGD are related to the changes in the tear film and ocular surface with symptoms of ocular discomfort. In recent years, many surveys have evaluated symptoms associated with the use of Video Display Terminals (VDT), and VDT use is recognized as a risk factor for eye discomfort. The aim of the present study was to determine if the presence of MGD contributes to the signs and symptoms of ocular discomfort during the use of VDT. Methods In course of a routine health surveillance programme, a group of 70 subjects fulfilled the inclusion criteria and responded to a questionnaire about symptoms of ocular discomfort. The following ocular tests were performed: tear break-up time, fluorescein corneal stain, and basal tear secretion test. Results A total of 52 subjects out of 70 (74.3%) had MGD. A statistically significant correlation between the symptoms of ocular discomfort and hours spent on VDT work was observed in the total population (r ¼ 0.358; P ¼ 0.002; 95% CI 0.13-0.54) and in the group of subjects with MGD (r ¼ 0.365; P ¼ 0.009; 95% CI 0.103-0.58). Such correlation was not shown in subjects without MGD. Conclusions The high prevalence of MGD among the subjects with symptoms of ocular discomfort suggests that this diagnosis should be considered when occupational health practitioners encounter ocular complaints among VDT operators. It appears that MGD can contribute to the development of ocular discomfort in VDT operators.

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Section: Discussionmentioning

confidence: 70%

Section: Introductionmentioning

confidence: 99%

Meibomian gland dysfunction and ocular discomfort in video display terminal workers

Fenga

Aragona

Cacciola

et al. 2007

Eye

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show abstract

“…Further, many vocational and other conditions, including computer use, concentrated near work and fatigue, may result in inhibition of blinking and the presence of dry eye symptoms. [36][37][38][39][40][41][42][43] Thus, many dry eye states are likely to be intermittent and variable in severity, and may not be present or recalled at the time of the subject's examination, or when participating in a study. A more comprehensive and specific history and questionnaire is required to address this issue with emphasis on the presence of symptoms at the time of the examination.…”

Section: Discussionmentioning

confidence: 99%

Correlation of lipid layer thickness measurements with fluorescein tear film break-up time and Schirmer's test

Isreb

Greiner

Korb

et al. 2003

Eye

117

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Purpose This study correlates measurement of lipid layer thickness (LLT) with two frequently used dry eye tests, fluorescein break-up time (FBUT) and Schirmer's test with anaesthesia (STA). Methods Subjects (n ¼ 44 eyes) with symptoms of dry eye and positive results for dry eye with either FBUT or STA or both were selected. Quantification of LLT was performed by the observation of colour interference patterns in zones of specular reflection using a custom-designed instrument. Results All correlations among pairs of tests were strong and exhibited a significance of Po0.000: STA with FBUT, Pearson's correlation 0.653; STA with LLT, 0.764; FBUT with LLT, 0.751. When LLT was high, ie Z120 nm, which occurred in 14 eyes, STA was also elevated in those eyes and FBUT was high in 13 of the 14 eyes. When LLT was low, ie r60, which occurred in 22 eyes, STA was below normal in 14 of the 22 eyes, and FBUT was below normal in 15 of the 22 eyes. These clinical observations paralleled the statistical findings computed from the entire data set. Conclusions The correlations demonstrated in this study support the premise (1) that measurement of LLT is a reliable test for the diagnosis of dry eye, and (2) that aqueous deficiency and lipid deficiency, as they apply to dry eye disorders, are not mutually exclusive.

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“…Visual performance demand (ie, work difficulty, complexity, and overload) also results in lower blink frequencies (49). VDU work is an important factor that reduces blink frequency and at the same time enhances the interblink interval significantly (50). For contact lens wearers, the break-up time is lower at low relative humidity (51).…”

Section: Factors Influencing Blinking and The Formation Of Tear Filmmentioning

confidence: 99%

Eye irritation and environmental factors in the office environment-hypotheses, causes and a physiological model

Wolkoff¹,

Skov²,

Franck³

et al. 2003

Scand J Work Environ Health

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Effect of Visual Display Unit Use on Blink Rate and Tear Stability

Cited by 204 publications

References 0 publications

Meibomian gland dysfunction and ocular discomfort in video display terminal workers

Meibomian gland dysfunction and ocular discomfort in video display terminal workers

Correlation of lipid layer thickness measurements with fluorescein tear film break-up time and Schirmer's test

Eye irritation and environmental factors in the office environment-hypotheses, causes and a physiological model

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