视力表上,(0.3)视力一行E字母的大小是多高多宽?
具体用尺寸来说明:
国际标准视力表 对数视力表 屈光度 E字的净大小mm
0.100020188 4.0 999.7981653 72.7074256
0.125915414 4.1 794.1839426 57.75472682
0.158514915 4.2 630.8554631 45.87713625
0.199554426 4.3 501.1164216 36.44224025
0.251219067 4.4 398.0589575 28.94768468
0.316259684 4.5 316.1958515 22.99442742
0.398139316 4.6 251.1683625 18.26549164
0.501217585 4.7 199.5141492 14.5090886
0.630982817 4.8 158.482921 11.52521138
0.794344269 4.9 125.89 9.154985603
1 5.0 100 7.272210345
1.2589 5.1 79.43442688 5.776638609
1.58482921 5.2 63.09828174 4.588639772
1.995141492 5.3 50.12175847 3.644959704
2.511683625 5.4 39.81393158 2.895352851
3.161958515 5.5 31.62596837 2.299906944
3.980589575 5.6 25.12190672 1.826917899
5.011164216 5.7 19.95544263 1.451201763
6.308554631 5.8 15.85149148 1.152753803
@xh990 的答案,人家给的答案没毛病啊,你们就是懒~
1862年Snellen提出由笔画粗细相似的字母组成测试视力的表格,即字母视力表。目前最常用的是E字母视力表,视标笔画宽度约为1分视角,字母高度、水平宽度均为5分视角,水平字母之间的宽度为4~6分视角。
具体用尺寸来说明:
国际标准视力表 对数视力表 屈光度 E字的净大小mm
0.100020188 4.0 999.7981653 72.7074256
0.125915414 4.1 794.1839426 57.75472682
0.158514915 4.2 630.8554631 45.87713625
0.199554426 4.3 501.1164216 36.44224025
0.251219067 4.4 398.0589575 28.94768468
0.316259684 4.5 316.1958515 22.99442742
0.398139316 4.6 251.1683625 18.26549164
0.501217585 4.7 199.5141492 14.5090886
0.630982817 4.8 158.482921 11.52521138
0.794344269 4.9 125.89 9.154985603
1 5.0 100 7.272210345
1.2589 5.1 79.43442688 5.776638609
1.58482921 5.2 63.09828174 4.588639772
1.995141492 5.3 50.12175847 3.644959704
2.511683625 5.4 39.81393158 2.895352851
3.161958515 5.5 31.62596837 2.299906944
3.980589575 5.6 25.12190672 1.826917899
5.011164216 5.7 19.95544263 1.451201763
6.308554631 5.8 15.85149148 1.152753803