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International Archives of Occupational and Environmental Health

Published in:

01-04-2018 | Original Article

Ocular surface and tear film status among contact lens wearers and non-wearers who use VDT at work: comparing three different lens types

Authors: Ana Tauste, Elena Ronda, Valborg Baste, Magne Bråtveit, Bente E. Moen, María-del-Mar Seguí Crespo

Published in: International Archives of Occupational and Environmental Health | Issue 3/2018

Abstract

Purpose

To analyze differences in the ocular surface appearance and tear film status of contact lens wearers and non-wearers in a group of visual display terminals (VDT) workers and additionally to assess differences between lens materials.

Methods

Cross-sectional study of 236 office workers, of whom 92 were contact lens wearers. Workers provided information on their contact lenses (conventional hydrogel, silicone hydrogel or rigid gas permeable lenses) and exposure to VDT at work. Ocular surface and tear film status were determined by the presence of bulbar, limbal and lid redness, lid roughness and corneal staining type, and by Schirmer’s and tear break-up time tests (TBUT). A generalized linear model was used to calculate the crude (cRR) and age- and sex-adjusted (aRR) relative risk to measure the association between ocular surface and tear film abnormalities and contact lens use and type.

Results

The aRR of ocular surface abnormalities was higher in contact lens wearers compared to non-wearers: bulbar redness (aRR 1.69; 95% CI 1.25–2.30), limbal redness (aRR 2.87; 1.88–4.37), lid redness (aRR 2.53; 1.35–4.73) and lid roughness (aRR 7.03; 1.31–37.82). VDT exposure > 4 h/day increased wearers’ risk of limbal and lid redness. Conventional hydrogel wearers had the highest risk of ocular surface abnormalities, followed by silicone hydrogel wearers. Both contact and non-contact lens wearers had a high prevalence of altered TBUT (77.3 and 75.7% respectively) and Schirmer (51.8 and 41.3%).

Conclusions

Regular contact lens use during VDT exposure at work increases risk of bulbar, limbal and lid redness, and lid roughness, especially in soft contact lens wearers. The high prevalence of altered TBUT and Schirmer’s results in all participants suggests that VDT use greatly affects tear film characteristics.

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Title: Ocular surface and tear film status among contact lens wearers and non-wearers who use VDT at work: comparing three different lens types
Authors: Ana Tauste
Elena Ronda
Valborg Baste
Magne Bråtveit
Bente E. Moen
María-del-Mar Seguí Crespo
Publication date: 01-04-2018
Publisher: Springer Berlin Heidelberg
Published in: International Archives of Occupational and Environmental Health / Issue 3/2018
Print ISSN: 0340-0131
Electronic ISSN: 1432-1246
DOI: https://doi.org/10.1007/s00420-017-1283-2

At a glance: The STEP trials

Springer Medicine

Ocular surface and tear film status among contact lens wearers and non-wearers who use VDT at work: comparing three different lens types

Abstract

Purpose

Methods

Results

Conclusions

At a glance: The STEP trials

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusions

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