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[Measurement and evaluation of visual index in VDT operators under Multi-user system]
Abstract
Objective:
To evaluate the visual function of the visual display terminal (VDT) operators under the Multi-user system.
Method:
Subjective symptoms of the VDT operators under the Multi-user system were measured before and after work in the field study. Visual indices were measured at 8:15, 9:15, 10:15, 11:15, or 12:15 a.m.
Result:
No discomfort symptom was observed during the working time, and Longitudino-Kinetic visual acuity, and Critical flicker frequency didn't decrease. Refraction showed no significant decrease as compared with that at 8:15 except that of right eye measured at 12:15.
Conclusion:
The Visual function of the VDT operators remained good in the Multi-user's system.