发明授权
- 专利标题: Optometric apparatus and lens power determination method
- 专利标题(中): 眼科仪器和镜片功率测定方法
-
申请号: US10531958申请日: 2003-08-26
-
公开(公告)号: US07429109B2公开(公告)日: 2008-09-30
- 发明人: Akio Toshima , Takehiko Yoshida
- 申请人: Akio Toshima , Takehiko Yoshida
- 申请人地址: JP Osaka
- 专利权人: Vision Optic Co., Ltd.
- 当前专利权人: Vision Optic Co., Ltd.
- 当前专利权人地址: JP Osaka
- 代理机构: Keating & Bennett, LLP
- 优先权: JP2002-306419 20021021
- 国际申请: PCT/JP03/10733 WO 20030826
- 国际公布: WO2004/034893 WO 20040429
- 主分类号: A61B3/02
- IPC分类号: A61B3/02 ; A61B3/00
摘要:
An optometric apparatus and an optometric method which perform an accurate eye examination on people who have a wide range of refractive powers with astigmatism, myopia or hyperopia, and which are also applicable especially to those with mixed astigmatism are provided. The apparatus performs a subjective eye examination by prompting a subject to view test symbols displayed on a computer screen by one of the right and left eyes at a time. The system includes astigmatic axis angle determination means which displays test symbols for determining an astigmatic axis angle and then determines the astigmatic axis angle, hyperopia and myopia determination means which displays test symbols for determining hyperopia or myopia in two orthogonal orientations selected based on the determined astigmatic axis angle, and determines hyperopia or myopia at the astigmatic axis angle and at an angle orthogonal thereto, and refractive power determination means which displays test symbols for determining a refractive power in two orthogonal orientations selected based on the determined astigmatic axis angle and determines a refractive power at the astigmatic axis angle and at an angle orthogonal thereto.
公开/授权文献
- US20060152675A1 Optometric Apparatus and Lens Power Determination Method 公开/授权日:2006-07-13
信息查询