In order to make an inquiry into a simple and effective way which is able to control corneal astigmatism after cataract extraction and implantation of intraocular lens.
目的探讨控制白内障摘出及人工晶状体植入术后角膜散光的简易而有效的方法。
Photorefractive keratectomy (PRK). PRK is sometimes used if you have a low to moderate degree of nearsightedness or farsightedness, or if you have nearsightedness with astigmatism.
屈光性角膜切除术(PRK)：当你有低于中等度数的近视或者远视，或者近视加散光，有时会选择prk。
In astigmatism, the surface of the cornea or lens has a somewhat different curvature in one direction than another.
在散光中，同一方向上，角膜和晶状体表面的曲率是不同的。
Since off-axis wander results in images which have astigmatism when the prism is placed in a converging beam, Glan types have slightly better imaging qualities than Nicla types.
因为当棱镜置于会聚光束中时，离轴漂移造成有像散的像，格兰型棱镜的成像质量比尼·科尔型略好。
The traditional large incision extracapsular cataract extraction surgery often caused a surgically induced corneal astigmatism which had great impact on fuming effect.
传统的大切口白内障囊外摘出术常造成较大的手术源性角膜散光，影响复明效果。
Astigmatism occurs if the cornea is shaped like a rugby its curvature is not uniform. As a result horizontal lines are focused to a different point from vertical lines.
若角膜呈榄球形状，即其弧度呈不规则，水平光线将聚焦在和垂直光线不同的焦点，这便是散光。
METHODS: a total of 2023 children with amblyopia (aged 4-11 years, 3657 eyes) were recruited. The prevalence of astigmatism was investigated.
方法：选取4 ~ 11岁弱视儿童2023例(3657眼)，对其散光的分布情况进行调查。
A model for calculating ablation profile to precompensate for spherical aberration and the higher order astigmatism is presented.
研究了补偿球差和高阶散光的像差与角膜切削量的关系，即补偿球差和高阶散光的角膜切削模型。
The astigmatism from a plane grating placed in the divergent light beam was used to compensate the astigmatism from an objective lens.
将平面光栅置于发散光中，利用平面光栅产生的像散来补偿物镜产生的像散。
It appears eyelids do play a part in determining the shape of the cornea. One explanation is that pressure from the eyelids is involved in the cause of corneal astigmatism.
看起来眼睑在决定角膜形状方面起着一定作用，这种现象的一种解释就是眼睑与角膜散光有关。
Astigmatism is caused when the cornea is shaped irregularly like a football.
散光是由于角膜时，形状像一个足球不定期。
I think the EDG probably USES a low astigmatism eyepiece design like the se.
我想EDG可能使用了象SE一样的低像散目镜设计。
Abstract : A modified Czerny-Turner spectral imaging system was developed based on aberration theory to minimize the large astigmatism in classical Czerny-Turner spectrometers.
摘要 ： 针对传统的车尔尼-特纳光谱仪像散较大的缺点，基于像差理论，提出了一种改进的车尔尼-特纳光谱成像系统。
A discussion is given of the method of determining the position of the focal point when the measured lens is with primary astigmatism. The measuring results are also included.
被测物镜有初级象散时确定焦点位置的方法，并给出了测量结果。
The broadband astigmatism corrected simultaneously conditions were deduced, and the astigmatism was corrected in a wide spectral region.
推导出了宽谱段像散同时校正条件，实现了宽谱段像散的同时校正。
In this paper a series of formulas for calculation of astigmatism formed by tiny light beam on a HOE plate have been derived.
本文推导了在全息光学元件上细光束象散计算的全套公式。
In this paper a series of formulas for calculation of astigmatism formed by tiny light beam on a HOE plate have been derived.
本文推导了在全息光学元件上细光束象散计算的全套公式。
应用推荐