title: [Effect of visual work on the tear film and degree of the eye strain].
abstract: BACKGROUND
  The aim of this study was to assess the impact of the visual work on the tear film and the degree of eye strain.
  
  
  METHODS
  The survey was conducted among 50 people working 4 h with different types of monitors (CRT, LCD) and without a monitor. Schirmer's test and evaluation of the degree of eye strain were performed in all subjects before and after work.
  
  
  RESULTS
  The studies revealed no significant change in Schirmer's test. Most people reported eye fatigue after every kind of visual work. The highest degree of eye strain was noted after work with the CRT display screen, especially among people with dry eye syndrome.
  
  
  CONCLUSIONS
  The studies revealed no significant impact of various visual works on the tear film. However, they showed that any kind of intense eye work may cause eye irritation and strain, particularly in the people affected by dry eye syndrome.
authors.affiliation: Przychodnia Chorób Zawodowych, Instytut Medycyny Pracy im. prof. J. Nofera, Łódź. alapw@imp.lodz.pl
authors.forename: Alicja
authors.initials: A
authors.lastname: Pas-Wyroślak
authors.forename: Ewa
authors.initials: E
authors.lastname: Wagrowska-Koski
mesh_terms: D000328:Adult; D001248:Asthenopia / Q000453:epidemiology*; D015984:Causality; D015897:Comorbidity; D016288:Computer Terminals / Q000145:classification*; D003626:Data Display; D015352:Dry Eye Syndromes / Q000453:epidemiology*; D004784:Environmental Monitoring; D062665:Epidemiological Monitoring; D004867:Equipment Design; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D009816:Office Automation; D011159:Population Surveillance; D013666:Tears / Q000378:metabolism; D055815:Young Adult