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NR. 2/2005
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Wpływ wybranych
czynników fizycznych środowiska pracy na występowanie zaburzeń
filmu łzowego u pracowników biurowych
Influence of Selected
Physical Microclimate Parameters on the Tear Film Stability
Changes Among Office Workers
Karolina Agopsowicz1, Jarosław
Marek1, Krzysztof Dudek2, Rafał Spławski3
1Katedra i Klinika Okulistyki Akademii Medycznej we
Wrocławiu
Kierownik: prof. dr hab. med. Maria Hanna Niżankowska
2Instytut Maszyn i Inżynierii Pomiarów Politechniki
Wrocławskiej
Kierownik: prof. dr hab. inż. Eugeniusz Rusiński
3Katedra Klimatyzacji i Ciepłownictwa Politechniki
Wrocławskiej
Kierownik: prof. dr hab. inż. Janusz Jeżowiecki |
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| Summary: |
„Dry eye like” symptoms
are commonly reported by VDU operators.
The purpose of this investigation was to
determine whether a tear film stability changes with
time had been modified by environmental conditions.
Methods: Precorneal tear film stability was
assessed by non invasive methods, followed by (within a
few days) Schirmer's test, FBUT, lissamine green
staining. Blink rate was recorded by video camera
system. Air parameters (temperature, humidity, velocity)
were collected using TESTO, type 454. The microclimate
parameters remained stable throughout the study period.
Ocular temperature was assessed with a termographic
camera (Thermovision 550). Lipid layer structure and
tear film stability were assessed with the Keeler
Tearscope. All measurements were carried out in the
morning and after 6 hours of intensive, continuous
office work.
Results: After long periods of intensive work in
air conditioned rooms there were significant changes in
the tear film stability: the lipid layer patterns
assumed typically „office eye syndrome”. The temperature
loss varied noticeably among VDU operators and reached
in some cases 1.6°C loss in 7 sec. Subjects with low BUT
tests had higher TVF values and slower blink rates, but
were sometimes asymptomatic. The subjective dry eye
symptoms tend to aggravate with decreased relative air
humidity. However, in some cases we detect a noticeable
adaptation process of the tear film, reaching a stable
profile after 6 hours of work.
Conclusions: There was a noticeable change in
tear film stability after several hours of intensive
work in front of VDU. Type of air conditioning also
plays a great role in causing „dry eye like” symptoms in
VDU operators. |
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| Key words: |
office eye syndrome, lipid
layer, air condition, thermovision. |
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