Influence of VDT Work on Accommodative Function.
- Author:
Jin Seong YOO
1
;
Jung Woo YOON
;
Jae Do KIM
Author Information
1. Department of Ophthalmology, Catholic University Medical College, Seoul, Korea.
- Publication Type:Original Article
- Keywords:
Accommodative constriction time;
Accommodative power;
AriAs;
Infrared optometer;
Visual display terminal work
- MeSH:
Constriction;
Reference Values
- From:Journal of the Korean Ophthalmological Society
1992;33(7):693-397
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
In order to observe the influence of visual display terminal (VDT) work on accommodative function, we measured accommodative power, accommodative constriction time and accommodative response / accommodative stimulus ratio (Ar / As) by infrared optometer on 15 normal subjects who were not exposed to VDT work before. VDT task was programed to search a specified Korean alphabet letter among randomized letters for 90 minutes. After VDT task, accommodative constriction time was prolonged, near point extended and accommodative power decreased in all subjects (p<0.05, by paired t-test). After resting for 30 minutes, constriction time, near point and accommodative power had a tendency to return to the previous normal value. Accommodative response / accommodative stimulus ratio (Ar / As) was decreased according to the duration of VDT work but no statistical difference was found between before and after VDT work. From this study, it is suggested that the function of accommodation seems to be affected by VDT work.
