作者kramnik (progressive)
看板optical
标题[心得] 球面隐形眼镜.泪镜矫正散光的真实性与否
时间Fri Nov 27 17:17:41 2009
根据Aspheric Contact Lenses: Fact and Fiction
An examination of whether soft aspheric contact lenses can correct
astigmatism and spherical aberration.
By Pete Kollbaum, OD, FAAO and Arthur Bradley, PhD
http://www.clspectrum.com/article.aspx?article=12770
实验对象：
14 eyes with low amounts of astigmatism
(-0.75 ±0.87D, five eyes with against-the-rule [ATR]
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下图为wavefront分析(排除2阶球差项)
http://www.clspectrum.com/archive/2005/March/Picture2.jpg
可以看出仅有散光隐形眼镜能够近乎完全弭除散光
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下为各隐形眼镜弭除散光实验结果
TABLE Residual Astigmatism with CLs
LENS ASTIGMATISM (DIOPTERS)
Acuvue 2 sphere -0.63
Choice AB asphere -0.74
Definitions AC asphere -0.60
Frequency 55 asphere -0.64
GP sphere -0.67
Biomedics Toric -0.02
可以看出球面隐形眼镜几乎对散光的弭除没有效果
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※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 118.168.84.238
1F：→ joeneowu:我想...你末尾的球面隐形眼镜指的是"只有球面度"的吧? 11/27 23:53
2F：→ joeneowu:不过从引用资料的title来看,主旨是讨论软式隐形眼镜 11/27 23:54
3F：→ joeneowu:通常因为软式的服贴特性,泪镜效应比较少在讨论... 11/27 23:54
4F：→ joeneowu:但用硬式的"球面"片时,效果应该会非常显着(只要他的散光 11/27 23:55
5F：→ joeneowu:主要来自角膜)...您的标题是否将球面改为软式较为稳妥 11/27 23:55
6F：→ kramnik:您说的没错..我去改标题.. 11/28 00:05
7F：→ sazana:GP contact lenses are also known as rigid gas permeable 11/28 00:06
8F：→ sazana:GP=RGP 但文内未说明原因，也许是镜片诱发性散光 11/28 00:15
9F：→ sazana:当角膜散光被球面RGP克服後，所表现出的内部散光(晶体散光) 11/28 00:22
※ 编辑: kramnik 来自: 118.168.82.172 (11/28 14:04)
10F：→ kramnik:实验资料没有详列..硬式球面片比较起来应该会有一定的效果 11/28 18:56
11F：→ kramnik:www.clspectrum.com/archive/2005/March/Picture2.jpg 11/28 18:57
12F：→ kramnik:wavefront分析图可以看出佩带硬式後..散光值有较低.. 11/28 18:58