The author conducted a series of studies on fatigue rate and its influence on Asthenopia of 306 professional workers (Compositors, typists, drivers and college students) who work under the environment of neuro-sensory stress. By using the "Prince-rule", the author compared the differences of accommodative power before and after the work in order to check the correlation between fatigue measurement check-off-list and temporary Asthenopia caused by work fatigue by the subjective symptoms, and also examined the interrelation of flicker value measured by flicker tester to obtain the fundamental data of industrial ophtalmologic survery.
The following results were obtained.
(1) High fatigue rate on neuro-sensory systems were found in compositors, taxi and bus drivers, and physical fatigue in typists, and mental and physical fatigues in college students.
(2) "Eye-fatigue" was the highest complaint among the ten-item questionnaire of neurosensory systems.
(3) The difference of accommodative power before and after work of Asthenopia showed in
order of compositors, taxi and bus drivers, college students, and chauffeures (p<0.01).
(4) Statistical data showed that the coefficient of correlation between neuro-sensory
systems fatigue rate and accommodative power before and after work was r=+0.538
(p<0.01) and the difference of flicker values was r=+0.312 (p<0.05).
(5) Correlation coefficient between accommodative power and flicker value was obtained
as r=+0.518, and based on this coefficient, Regression equation of flicker value(Hz/
sec) =0.84x (accommodative power) +31.77 was also obtained.
(6) Correlation coefficient between the change of temperature in mouth and accommodative power was r=+0.361 (p<0.01), and the change of temperature in mouth and flicker value was r=+0.475 (p<0.01).
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