| 发明名称 |
APPARATUS FOR MEASURING THE ACUITY OF LOW-VISION PATIENTS |
| 摘要 |
An optical system for measuring the acuity of a low-vision patient has a variably magnified image of a reference character displayed on a rear vision screen. The image is effectively rotatable in order to provide the operator with a verification of the response of the patient.
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| 申请公布号 |
US3639042(A) |
申请公布日期 |
1972.02.01 |
| 申请号 |
USD3639042 |
申请日期 |
1970.06.10 |
| 申请人 |
AMERICAN OPTICAL CORP. |
发明人 |
BERNARD GROLMAN |
| 分类号 |
A61B3/032;(IPC1-7):A61B3/02 |
主分类号 |
A61B3/032 |
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