发明名称 |
Contrast chart device, contrast sensitivity measuring device and contrast sensitivity measuring method |
摘要 |
A contrast chart device of the present invention comprises a contrast target presenting part for presenting a contrast target for a contrast sensitivity test at prescribed timing; a pupil data measuring part for producing an image of an anterior ocular segment of a subject and measuring the diameter or area of a pupil region in the anterior ocular segment; and a measurement timing forming part for forming timing at which the pupil data measuring part performs measurement.
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申请公布号 |
US7441900(B2) |
申请公布日期 |
2008.10.28 |
申请号 |
US20040467159 |
申请日期 |
2004.01.05 |
申请人 |
TOPCON CORPORATION |
发明人 |
MIHASHI TOSHIFUMI;HIROHARA YOKO |
分类号 |
A61B3/02;A61B3/032;A61B3/11 |
主分类号 |
A61B3/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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