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Characteristics of spontaneous eyeblink activity during video display terminal use in healthy volunteers

  • Clinical Investigation
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Abstract

Purpose

To analyse the spontaneous eyeblink rate (SEBR) and inter-eyeblink intervals (IEBI) of normal volunteers before and during video display terminal (VDT) use.

Methods

The SEBR of 51 normal volunteers was measured by counting the absence of the corneal reflex using a computer-based video analysis system. Only complete eyeblinks were recorded within 10 min under three different conditions: during a conversation, during VDT use without corneal anaesthesia, and during VDT use with corneal anaesthesia. The IEBI (in seconds) were determined to study individual time-dependent changes of SEBR.

Results

In comparison with SEBR during conversation (mean 15.54 eyeblinks/min, standard deviation ±13.74 eyeblinks/min) the SEBR decreased significantly during VDT use without corneal anaesthesia (5.34 ± 4.53 eyeblinks/min). Corneal anaesthesia further significantly reduced SEBR (2.78 ± 2.77 eyeblinks/min). The SEBR was characterized by marked interindividual variability, ranging between 11 and 664 eyeblinks/10 min during conversation, between 4 and 189 eyeblinks during VDT use without corneal anaesthesia and between 1 and 119 eyeblinks at VDT use with corneal anaesthesia. No significant correlation between SEBR (during conversation or during VDT use) and quality (break-up time) or quantity (Schirmer I test, Jones test) of the tear film could be detected. Evaluation of the IEBI revealed three different types of eyeblink pattern during VDT use without corneal anaesthesia. Type 1 was characterized by a very low SEBR (0–2 eyeblinks/min) and relatively homogeneous distribution of eyeblinks, type 2 showed a moderate SEBR (1.2–8.5 eyeblinks/min) including three further subtypes. Type 3 was characterized by a high SEBR (6.8–18.9 eyeblinks/min) of regular or irregular pattern.

Conclusions

VDT use is associated with a profound decrease of the SEBR in healthy subjects. There are marked interindividual differences in SEBR and no correlation between the SEBR and ocular tear film parameters in normal eyes. The SEBR is further reduced by corneal anaesthesia. The presence of different patterns of eyeblinking may be related to various exogenous and endogenous factors and may lead to a better understanding of ocular reactions during VDT use.

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References

  1. Acosta MC, Gallar J, Belmonte C (1999) The influence of eye solutions on blinking and ocular comfort at rest and during work at video display terminals. Exp Eye Res 68:663–669

    Article  CAS  PubMed  Google Scholar 

  2. Al-Abdulmunem M (1999) Relation between tear breakup time and spontaneous blink rate. ICLC 26:117–120

    PubMed  Google Scholar 

  3. Carney LG, Hill RM (1982) The nature of normal blinking patterns. Acta Ophthalmol 60:427–433

    CAS  Google Scholar 

  4. Dain SJ, McCarthy AK, Chan-Ling T (1988) Symptoms in VDU operators. Am J Optom Physiol Opt 65:162–167

    CAS  PubMed  Google Scholar 

  5. Doughty MJ (2001) Consideration of three types of spontaneous eyeblink activity in normal humans: during reading and video display terminal use, in primary gaze, and while in conversation. Optom Vis Sci 78:712–725

    CAS  PubMed  Google Scholar 

  6. Hikichi T, Yoshida A, Fukui Y, Hamano T, Ri M, Araki K, Horimotot K, Takamura E, Kitagawa K, Oyama M (1995) Prevalence of dry eye in Japanese eye centers. Graefes Arch Clin Exp Ophthalmol 233:555–558

    CAS  PubMed  Google Scholar 

  7. Jones LT (1966) The lacrimal secretory system and its treatment. Am J Ophthalmol 62:47–60

    CAS  PubMed  Google Scholar 

  8. Karson CN, Berman KF, Donnelly EF, Mendelson WB, Kleinman JE, Wyatt RJ (1981) Speaking, thinking and blinking. Psychiatry Res 5:243–246

    Article  CAS  PubMed  Google Scholar 

  9. Nakamori K, Odawara BS, Nakajimia T, Mizutani T, Tsubota K (1997) Blinking is controlled primarily by ocular surface conditions. Am J Ophthalmol 124:24–30

    CAS  PubMed  Google Scholar 

  10. Patel S, Henderson R, Bradley L, Galloway B (1991) Effect of visual display unit use on blink rate and tear stability. Optom Vis Sci 68:888–892

    CAS  PubMed  Google Scholar 

  11. Prause JU, Norn M (1987) Relation between blink frequency and break-up time. Acta Ophthalmol 65:19–22

    CAS  Google Scholar 

  12. Salibello C, Nilsen E (1995) Is there a typical VDT patient? A demographic analysis. J Am Optom Assoc 66(8): 479–483

    CAS  PubMed  Google Scholar 

  13. Schirmer O (1903) Studien zur Physiologie und Pathologie der Tränenabsonderung und Tränenabfuhr. Albrecht v Graefes Arch Ophthalmol 56:197–291

    Google Scholar 

  14. Shimmura S, Shimazaki J, Tsubota K (1999) Results of a population-based questionnaire on the symptoms and lifestyles associated with dry eye. Cornea 18:408–411

    CAS  PubMed  Google Scholar 

  15. Stern JA (1994) Blink rate: a possible measure of fatigue. Human factors 36:285–297

    CAS  PubMed  Google Scholar 

  16. Thomson WD (1998) Eye problems and visual display terminals—the facts and the fallacies. Ophthalmic Physiol Opt 18 (2): 111–119

    CAS  PubMed  Google Scholar 

  17. Toda I, Fujishima H, Tsubota K (1993) Ocular fatigue is the major symptom of dry eye. Acta Ophthalmol 71:347–352

    CAS  Google Scholar 

  18. Tsubota K, Nakamori K (1993) Dry eyes and video display terminals. N Engl J Med 328:584

    Article  CAS  Google Scholar 

  19. Tsubota K, Nakamori K (1995) Effects of ocular surface area and blink rate on tear dynamics. Arch Ophthalmol 113:155–158

    CAS  PubMed  Google Scholar 

  20. Tsubota K, Hata S, Okusawa Y, Egami F, Ohtsuki T, Nakamori K (1996) Quantitative videographic analysis of blinking in normal subjects and patients with dry eye. Arch Ophthalmol 114:715–720

    CAS  PubMed  Google Scholar 

  21. Yap M (1991) Tear-break-up time is related to blink frequency. Acta Ophthalmol 69:92–94

    CAS  Google Scholar 

  22. Zaman ML, Doughty MJ, Button NF (1998) The exposed ocular surface and its relationship to spontaneous eyeblink rate in elderly caucasians. Exp Eye Res 67:681–686

    Article  CAS  PubMed  Google Scholar 

Download references

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Correspondence to Nora Freudenthaler.

Additional information

Presented at the annual meeting of the German Ophthalmological Society, Berlin, 2002

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Freudenthaler, N., Neuf, H., Kadner, G. et al. Characteristics of spontaneous eyeblink activity during video display terminal use in healthy volunteers. Graefe's Arch Clin Exp Ophthalmol 241, 914–920 (2003). https://doi.org/10.1007/s00417-003-0786-6

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  • DOI: https://doi.org/10.1007/s00417-003-0786-6

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