title: Effect of contact lens use on Computer Vision Syndrome.
abstract: OBJECTIVE
  To analyse the relationship between Computer Vision Syndrome (CVS) in computer workers and contact lens use, according to lens materials.
  
  
  METHODS
  Cross-sectional study. The study included 426 civil-service office workers, of whom 22% were contact lens wearers. Workers completed the Computer Vision Syndrome Questionnaire (CVS-Q) and provided information on their contact lenses and exposure to video display terminals (VDT) at work. CVS was defined as a CVS-Q score of 6 or more. The covariates were age and sex. Logistic regression was used to calculate the association (crude and adjusted for age and sex) between CVS and individual and work-related factors, and between CVS and contact lens type.
  
  
  RESULTS
  Contact lens wearers are more likely to suffer CVS than non-lens wearers, with a prevalence of 65% vs 50%. Workers who wear contact lenses and are exposed to the computer for more than 6 h day(-1) are more likely to suffer CVS than non-lens wearers working at the computer for the same amount of time (aOR = 4.85; 95% CI, 1.25-18.80; p = 0.02).
  
  
  CONCLUSIONS
  Regular contact lens use increases CVS after 6 h of computer work.
authors.affiliation: Doctorate Program on Health Science, University of Alicante, Alicante, Spain.|Public Health Research Group, University of Alicante, Alicante, Spain.
authors.forename: Ana
authors.initials: A
authors.lastname: Tauste
authors.affiliation: Public Health Research Group, University of Alicante, Alicante, Spain.|Preventive Medicine and Public Health Area, Faculty of Health Sciences, University of Alicante, Alicante, Spain.|CISAL (Centre for Research in Occupational Health), Barcelona, Spain.|CIBERESP (Biomedical Research Networking Centre, Epidemiology and Public Health), Madrid, Spain.
authors.forename: Elena
authors.initials: E
authors.lastname: Ronda
authors.affiliation: Valencian Institute of Occupational Safety and Health (INVASSAT), Alicante, Spain.
authors.forename: María-José
authors.initials: MJ
authors.lastname: Molina
authors.affiliation: Public Health Research Group, University of Alicante, Alicante, Spain.|Department of Optics, Pharmacology and Anatomy, University of Alicante, Alicante, Spain.
authors.forename: Mar
authors.initials: M
authors.lastname: Seguí
mesh_terms: D000328:Adult; D000368:Aged; D016288:Computer Terminals; D003263:Contact Lenses, Hydrophilic / Q000009:adverse effects*; D003430:Cross-Sectional Studies; D005128:Eye Diseases / Q000453:epidemiology / Q000209:etiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009784:Occupational Diseases / Q000453:epidemiology / Q000209:etiology*; D015995:Prevalence; D013030:Spain / Q000453:epidemiology; D011795:Surveys and Questionnaires; D013577:Syndrome; D013997:Time Factors; D014786:Vision Disorders / Q000453:epidemiology / Q000209:etiology*; D014792:Visual Acuity
keywords: Computer Vision Syndrome; computer terminals; contact lenses; occupational exposure; occupational health