| Co-Investigator(Kenkyū-buntansha) |
YAMAZAKI Sei SCHOOL OF MEDICINE,TOKYO MED.& DENT.UNIV., ASSISTANT PROFESSOR, 医学部, 助手 (10251521)
KAWASAKI Tutomu SCHOOL OF MEDICINE,TOKYO MED.& DENT.UNIV., ASSISTANT PROFESSOR, 医学部, 助手 (30204712)
OKUYAMA Fumio SCHOOL OF MEDICINE,TOKYO MED.& DENT.UNIV., ASSISTANT PROFESSOR, 医学部, 助手 (70134690)
OHZU Hitoshi SCHOOL OF SCIENCE AND ENGINEERING,WASEDA UNIV., PROFESSOR, 理工学部, 教授 (10063520)
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| Research Abstract |
We developed the apparatus for measuring kinetic visual acuity (KVA) , dynamic visual acuity (DVA) and visual acuity with short exposure time.
The features are as follows :
(1) The target velocity is variable in wide range from static up to 100km/h, in two direction forward and backward, horizontal. We can set in 7 stage of velocity in above range.
(2) The target presented position are 70m-4m in forward and +-2.0 degrees in horizontal.
(3) The exposure time is variable in 7 stages from 1/1000sec to 1sec.
(4) The four target sizes are available, target colors can be selected from white, red, green, blue and yellow, background illuminance is in 0.1 to 200cd/m2.
Further, We checked this apparatus performance and confirmed the performances.
In addition, We measured the kinetic visual acuity for subjects. The results are : the kinetic visual acuity decreased slowly with increasing target velocity up to 100Km/h. The KVA also depends on background illuminance of target. From these, the developed apparatus is considered to be useful in solving ocular fatigue and traffic ophthalmology.
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