The Dry Eye Zone

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Abstract: Contacts and computers (again)

Approximately one gajillion studies have been published to date showing the effects of any one or all of office air, computers and contact lenses for the ocular surface. Occasionally they're even somewhat interesting or informative.

The Impact of Contact Lens Wear and Visual Display Terminal Work on Ocular Surface and Tear Functions in Office Workers.

To evaluate the effect of contact lens (CL) wear and visual display terminal (VDT) work on the ocular surface and tear functions.

Prospective case-control study.

Sixty-nine CL wearers (45 women and 24 men; mean age, 35.2 ± 7.3 years), and 102 age- and sex-matched non-CL wearers were enrolled in the study (66 women and 36 men; mean age, 36.7 ± 7.3 years). Ocular surface and tear function tests, including vital stainings (fluorescein and rose bengal), Schirmer test, tear meniscus height measurement, and tear film break-up time were performed. The subjective symptoms of dry eyes were evaluated using a dry eye symptom questionnaire. The participants were divided into 4 subgroups according to the total time of VDT work in 1 day (VDT work time in 1 day ≥ 4 hours or < 4 hours) and presence of CL wear. Main outcome measures included ocular surface vital staining scores, Schirmer test results, tear film break-up time, tear meniscus height measurement, and symptom questionnaire score.

CL users and long-term VDT workers showed significantly worse tear meniscus height values than non-CL users and short-term VDT workers (P < .001). The mean visual symptom scores in CL wearers and long-term VDT workers were significantly higher than the other groups (P < .001).

Office workers who wore CLs and spent more than 4 hours engaged in VDT work had a lower tear meniscus volume with significant dry eye and visual symptoms triggered by environmental factors.

Am J Ophthalmol. 2011 Aug 24. [Epub ahead of print]
Kojima T, Ibrahim OM, Wakamatsu T, Tsuyama A, Ogawa J, Matsumoto Y, Dogru M, Tsubota K.
Johnson & Johnson Ocular Surface and Visual Optics Department, Keio University School of Medicine, Tokyo, Japan; Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan.