1989 Fiscal Year Final Research Report Summary
Basic studies of VRT and pocket flicker as a new apparatus for fatigue measurement
| Project/Area Number |
62870024
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| Research Category |
Grant-in-Aid for Developmental Scientific Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Hygiene
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| Research Institution | Hokkaido University |
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Principal Investigator |
SAITO Kazuo Hokkaido University School of Medicine, Professor., 医学部, 教授 (80000917)
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| Co-Investigator(Kenkyū-buntansha) |
SAITO Takeshi Hokkaido University School of Medicine, instructor., 医学部, 助手 (40153811)
HOSOKAWA Toshiyuki Hokkaido University School of Medicine, instructor., 医学部, 助手 (00157025)
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| Project Period (FY) |
1987 – 1989
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| Keywords | Fatigue evaluation / VRT / CFF |
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| Research Abstract |
The effects of the intensity of illumination and luminance of the CRT of a VRT apparatus, the effects of intensity of illumination and distance between the eyes and the light emitting diode (LED) of a pocket flicker (P.F.), and the changes in the critical fusion frequency (CFF) of the P.F. and in the VRT values with age were analyzed in this study.
The results obtained in this study are as follows.
1. A significant difference in VRT values was observed in the luminance of the CRT, but not for the illumination. Therefore, the VRT value does not change with the illumination as long as the luminance setting is constant.
2. A significant difference in the CFF values of the P.F. was observed for the distance between the eyes and the LED, but not for the illumination was not observed. Accordingly, the CFF value does not change with illumination, when the distance is constant.
3. It was suggested that the CFF value of the P.F. in the middle-aged group was lover than that of the younger group. This result shows that the CFF value should be taken into consideration when subjects belong to different age groups.
4. It was clarified that the VRT value does not change with age as long as subjects are trained sufficiently.
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