Tear secretion dysfunction among women workers engaged in light-on tests in the TFT-LCD industry

Shih Bin Su, Chih Wei Lu, Jiunn Woei Sheen, Shu Chun Kuo, How-Ran Guo

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Background: The TFT-LCD (thin film transistor liquid crystal display) industry is rapidly growing in Taiwan and many other countries. A large number of workers, mainly women, are employed in the light-on test process to detect the defects of products. At the light-on test workstation, the operator is generally exposed to low humidity (in the clean room environment), flashing light, and low ambient illumination for long working hours. Many workers complained about eye discomfort, and therefore we conducted a study to evaluate the tear secretion function of light-on test workers of a TFT-LCD company. Methods: We recruited workers engaged in light-on tests in the company during their periodical health examination. In addition to a questionnaire survey of demographic characteristics and ophthalmic symptoms, we evaluated the tear secretion function of both eyes of each participant using the Schirmer's lacrimal basal secretion test with anaesthesia. A participant with one or both eyes yielding abnormal test results was defined as a case of tear secretion dysfunction. Results: During the study period, a total of 371 light-on test workers received the health examination at the clinic of the park, and 52 of them were excluded due to having ophthalmic diseases and other systemic diseases that may affect ophthalmic function. All the remaining 319 qualified workers agreed to participate in this study, and they were all females working by 4-shift rotations. The average age was 24.2 years old (standard deviation [SD] = 3.8), and the average employment duration was 13.6 months (SD = 5.7). Among the 11 ophthalmic symptoms evaluated, eye dryness was the most prevalent (prevalence = 43.3%). In addition, the prevalence of tear secretion dysfunction in at least one eye was 40.1% (128 cases), and contact lens users had an odds ratio of 1.73 (95% confidence interval = 1.02-2.94) in comparison with non-contact lens users. Comparing the Schirmer's test results of those who also participated in the screening in the previous year, we found 40 of the 156 participants (17.2%) with normal test results in the previous year turned abnormal in 2001. In contrast, only 21 of the 76 participants (9.1%) with abnormal test results in the previous year turned normal, and the difference was statistically significant (p = 0.02 for McNemar's test). Conclusion: The prevalence of tear secretion dysfunction in woman workers engaged in light-on tests is high and increases with a one-year duration of employment. The use of contact lens may further increase the risk.

Original languageEnglish
Article number303
JournalBMC Public Health
Volume6
DOIs
Publication statusPublished - 2006 Dec 16

Fingerprint

Liquid Crystals
Tears
Industry
Light
Contact Lenses
Controlled Environment
Eye Diseases
Health
Humidity
Lighting
Taiwan
Lenses
Anesthesia
Odds Ratio
Demography
Confidence Intervals

All Science Journal Classification (ASJC) codes

  • Public Health, Environmental and Occupational Health
  • Medicine(all)

Cite this

Su, Shih Bin ; Lu, Chih Wei ; Sheen, Jiunn Woei ; Kuo, Shu Chun ; Guo, How-Ran. / Tear secretion dysfunction among women workers engaged in light-on tests in the TFT-LCD industry. In: BMC Public Health. 2006 ; Vol. 6.
@article{c74db82f81dc41558c365d643862fcd4,
title = "Tear secretion dysfunction among women workers engaged in light-on tests in the TFT-LCD industry",
abstract = "Background: The TFT-LCD (thin film transistor liquid crystal display) industry is rapidly growing in Taiwan and many other countries. A large number of workers, mainly women, are employed in the light-on test process to detect the defects of products. At the light-on test workstation, the operator is generally exposed to low humidity (in the clean room environment), flashing light, and low ambient illumination for long working hours. Many workers complained about eye discomfort, and therefore we conducted a study to evaluate the tear secretion function of light-on test workers of a TFT-LCD company. Methods: We recruited workers engaged in light-on tests in the company during their periodical health examination. In addition to a questionnaire survey of demographic characteristics and ophthalmic symptoms, we evaluated the tear secretion function of both eyes of each participant using the Schirmer's lacrimal basal secretion test with anaesthesia. A participant with one or both eyes yielding abnormal test results was defined as a case of tear secretion dysfunction. Results: During the study period, a total of 371 light-on test workers received the health examination at the clinic of the park, and 52 of them were excluded due to having ophthalmic diseases and other systemic diseases that may affect ophthalmic function. All the remaining 319 qualified workers agreed to participate in this study, and they were all females working by 4-shift rotations. The average age was 24.2 years old (standard deviation [SD] = 3.8), and the average employment duration was 13.6 months (SD = 5.7). Among the 11 ophthalmic symptoms evaluated, eye dryness was the most prevalent (prevalence = 43.3{\%}). In addition, the prevalence of tear secretion dysfunction in at least one eye was 40.1{\%} (128 cases), and contact lens users had an odds ratio of 1.73 (95{\%} confidence interval = 1.02-2.94) in comparison with non-contact lens users. Comparing the Schirmer's test results of those who also participated in the screening in the previous year, we found 40 of the 156 participants (17.2{\%}) with normal test results in the previous year turned abnormal in 2001. In contrast, only 21 of the 76 participants (9.1{\%}) with abnormal test results in the previous year turned normal, and the difference was statistically significant (p = 0.02 for McNemar's test). Conclusion: The prevalence of tear secretion dysfunction in woman workers engaged in light-on tests is high and increases with a one-year duration of employment. The use of contact lens may further increase the risk.",
author = "Su, {Shih Bin} and Lu, {Chih Wei} and Sheen, {Jiunn Woei} and Kuo, {Shu Chun} and How-Ran Guo",
year = "2006",
month = "12",
day = "16",
doi = "10.1186/1471-2458-6-303",
language = "English",
volume = "6",
journal = "BMC Public Health",
issn = "1471-2458",
publisher = "BioMed Central",

}

Tear secretion dysfunction among women workers engaged in light-on tests in the TFT-LCD industry. / Su, Shih Bin; Lu, Chih Wei; Sheen, Jiunn Woei; Kuo, Shu Chun; Guo, How-Ran.

In: BMC Public Health, Vol. 6, 303, 16.12.2006.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Tear secretion dysfunction among women workers engaged in light-on tests in the TFT-LCD industry

AU - Su, Shih Bin

AU - Lu, Chih Wei

AU - Sheen, Jiunn Woei

AU - Kuo, Shu Chun

AU - Guo, How-Ran

PY - 2006/12/16

Y1 - 2006/12/16

N2 - Background: The TFT-LCD (thin film transistor liquid crystal display) industry is rapidly growing in Taiwan and many other countries. A large number of workers, mainly women, are employed in the light-on test process to detect the defects of products. At the light-on test workstation, the operator is generally exposed to low humidity (in the clean room environment), flashing light, and low ambient illumination for long working hours. Many workers complained about eye discomfort, and therefore we conducted a study to evaluate the tear secretion function of light-on test workers of a TFT-LCD company. Methods: We recruited workers engaged in light-on tests in the company during their periodical health examination. In addition to a questionnaire survey of demographic characteristics and ophthalmic symptoms, we evaluated the tear secretion function of both eyes of each participant using the Schirmer's lacrimal basal secretion test with anaesthesia. A participant with one or both eyes yielding abnormal test results was defined as a case of tear secretion dysfunction. Results: During the study period, a total of 371 light-on test workers received the health examination at the clinic of the park, and 52 of them were excluded due to having ophthalmic diseases and other systemic diseases that may affect ophthalmic function. All the remaining 319 qualified workers agreed to participate in this study, and they were all females working by 4-shift rotations. The average age was 24.2 years old (standard deviation [SD] = 3.8), and the average employment duration was 13.6 months (SD = 5.7). Among the 11 ophthalmic symptoms evaluated, eye dryness was the most prevalent (prevalence = 43.3%). In addition, the prevalence of tear secretion dysfunction in at least one eye was 40.1% (128 cases), and contact lens users had an odds ratio of 1.73 (95% confidence interval = 1.02-2.94) in comparison with non-contact lens users. Comparing the Schirmer's test results of those who also participated in the screening in the previous year, we found 40 of the 156 participants (17.2%) with normal test results in the previous year turned abnormal in 2001. In contrast, only 21 of the 76 participants (9.1%) with abnormal test results in the previous year turned normal, and the difference was statistically significant (p = 0.02 for McNemar's test). Conclusion: The prevalence of tear secretion dysfunction in woman workers engaged in light-on tests is high and increases with a one-year duration of employment. The use of contact lens may further increase the risk.

AB - Background: The TFT-LCD (thin film transistor liquid crystal display) industry is rapidly growing in Taiwan and many other countries. A large number of workers, mainly women, are employed in the light-on test process to detect the defects of products. At the light-on test workstation, the operator is generally exposed to low humidity (in the clean room environment), flashing light, and low ambient illumination for long working hours. Many workers complained about eye discomfort, and therefore we conducted a study to evaluate the tear secretion function of light-on test workers of a TFT-LCD company. Methods: We recruited workers engaged in light-on tests in the company during their periodical health examination. In addition to a questionnaire survey of demographic characteristics and ophthalmic symptoms, we evaluated the tear secretion function of both eyes of each participant using the Schirmer's lacrimal basal secretion test with anaesthesia. A participant with one or both eyes yielding abnormal test results was defined as a case of tear secretion dysfunction. Results: During the study period, a total of 371 light-on test workers received the health examination at the clinic of the park, and 52 of them were excluded due to having ophthalmic diseases and other systemic diseases that may affect ophthalmic function. All the remaining 319 qualified workers agreed to participate in this study, and they were all females working by 4-shift rotations. The average age was 24.2 years old (standard deviation [SD] = 3.8), and the average employment duration was 13.6 months (SD = 5.7). Among the 11 ophthalmic symptoms evaluated, eye dryness was the most prevalent (prevalence = 43.3%). In addition, the prevalence of tear secretion dysfunction in at least one eye was 40.1% (128 cases), and contact lens users had an odds ratio of 1.73 (95% confidence interval = 1.02-2.94) in comparison with non-contact lens users. Comparing the Schirmer's test results of those who also participated in the screening in the previous year, we found 40 of the 156 participants (17.2%) with normal test results in the previous year turned abnormal in 2001. In contrast, only 21 of the 76 participants (9.1%) with abnormal test results in the previous year turned normal, and the difference was statistically significant (p = 0.02 for McNemar's test). Conclusion: The prevalence of tear secretion dysfunction in woman workers engaged in light-on tests is high and increases with a one-year duration of employment. The use of contact lens may further increase the risk.

UR - http://www.scopus.com/inward/record.url?scp=33846564483&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33846564483&partnerID=8YFLogxK

U2 - 10.1186/1471-2458-6-303

DO - 10.1186/1471-2458-6-303

M3 - Article

VL - 6

JO - BMC Public Health

JF - BMC Public Health

SN - 1471-2458

M1 - 303

ER -