发明名称 |
Ophthalmic apparatus |
摘要 |
<p>A grid (27) formed with apertures of a predetermined shape is illuminated with light from a lamp (21) and projected onto a tear meniscus (28) accumulated on the lower eyelid (36). The aperture image projected on the tear film is imaged by a CCD camera (31). The tear meniscus functions as a concave mirror, so that the magnification factor depends on the radius of meniscus curvature. A processor (32) calculates the magnitude of the grid image and evaluates the radius of meniscus curvature. Since the volume of lacrimal fluid (V1,V2) varies depending upon the radius of meniscus curvature (r1,r2), the latter is used as a value representing the lacrimal fluid volume for dry eye diagnose purposes. <IMAGE></p> |
申请公布号 |
EP0943288(A1) |
申请公布日期 |
1999.09.22 |
申请号 |
EP19990302096 |
申请日期 |
1999.03.18 |
申请人 |
KOWA COMPANY LTD.;YOKOI, NORIHIKO |
发明人 |
SUZUKI, TAKAYOSHI;YOKOI, NORIHIKO |
分类号 |
A61B3/10;G01B11/24;G01B11/255;(IPC1-7):A61B3/10 |
主分类号 |
A61B3/10 |
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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