Masaharu Takeda

CFF Values for Stress Caused by VDT Work and Relationship Among Analysis of Uric Properties

Publisher Summary This chapter presents occupational experiments that use the occupation of continuous one-digit addition (Kreapelins test) as the work load and occupational conditions are divided into one on the cathode ray tube, which is considered to be likely to result in asthenopia, and one on paper, which is considered to be unlikely to result in it. Changes of the critical flicker fusion frequency values (CFF) and catecholamine are considered the index of fatigue centralis. Then it is supposed that the CFF values are effective as the index including fatigue centralis as well as asthenopia if there is no difference between two conditions. In addition, if the end effects of work performance per unit (one minute) of the work load show the increase of the occupation resulting from liberation feeling from the workload, it is regard as the relief of fatigue centralis. These supposition are verified by means of the experiments.