Dry eye signs and symptoms in night-time workers

PurposeTo determine the effect of night-time working on dry eye signs and symptoms.
MethodsA total of 50 healthy subjects completed a dry eye questionnaire and underwent clinical examinations including basic Schirmer's test and tear breakup time (TBUT) test on two consecutive days, before and after the night shift (12-hrs night-shift).
ResultsAll dry eye symptoms were aggravated significantly after the night shift (P ConclusionOur study showed that night-time working can cause tear film instability and exacerbation of dry eye symptoms.