请输入您要查询的英文单词:

 

单词 jaeger test types
释义

Jaeger test types


Jaeger test types


Jae·ger test types

(yā'gĕr), type of different sizes used for testing the acuity of near vision.

Jae·ger test types

(yā'gĕr test tīps) Print of different sizes used for testing the acuity of near vision.

Jaeger,

Eduard, Ritter von Jaxtthal, Austrian ophthalmologist, 1818-1884. Jaeger hookJaeger keratome knifeJaeger lid plateJaeger lid retractorJaeger reading chartJaeger strabismus hookJaeger test types - type of different sizes used for testing the acuity of near vision.

Jaeger test types

Test types for measuring visual acuity at near. They consist of ordinary printers' types of various sizes and are arranged as words and phrases. Depending on the size of test types read, acuity is recorded as J.1, J.2 in ascending size up to J.20. The smallest Jaeger (J.1) subtends an angle of 5′ at 450 mm from the eye. See near visual acuity.
Table J1 Approximate relationship between the Jaeger system, the point system (or N notation) and the Snellen equivalent
Snellen equivalent at 40 cm
Jaegerpoint(m)(ft)
13.56/720/23
24.56/820/27
35.56/1120/37
46.56/1320/43
57.56/1420/47
686/1520/50
79.56/1720/57
8116/2020/67
9126/2420/80
10136/2620/87
11146/2820/93
12166/3020/100
13186/3620/120
14226/4520/150
随便看

 

英语词典包含2567994条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。

 

Copyright © 2004-2022 Newdu.com All Rights Reserved
更新时间:2024/12/23 21:54:35