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- Triple-Frequency Methods for Correcting Higher-Order Ionospheric Refractive Error in GPS Modernization GPS现代化后电离层折射误差高阶项的三频改正方法
- ionospheric refractive error 电离层折射误差
- To understand what refractive surgery does, we need to first know what a refractive error is. 我们要了解激光矫视是甚么一回事,便要首先掌握何谓屈光不正。
- The major reason of low vision is refractive error(54.41%),cataract(39.08%)and keratopathy(6.51%). 而在低视力人群中;致病原因的前三位因素是屈光不正54.;41%25;白内障39
- Objective:To evaluate the accuracy and application of a hand-held autorefractor in refractive error study in children. 目的:了解手持自动验光仪的准确性及其在儿童屈光不正调查中的应用价值。
- Refractive error more than -15.OD,, axial length over 29.0mm, and age more than 45 years old are risk factors for the development of early myopic maculopathy. 近视度数超过-15.;0D，眼轴长超过29
- Photorefraction is a method which can fast determine the refractive error by capturing a frame of pupillary image remotely. 摄影验光是一种根据一定距离拍摄的眼瞳图像快速确定屈光误差的测量方法。
- As with ordinary light, laser range measurements to satellites are not troubled by ionospheric refraction. 用激光测人造卫星的距离和用普通光一样，不受电离层折射的干扰。
- It is not to eliminate glasses and contact lenses completely. You may still need glasses for night driving and or reading, depending on your age and initial refractive error. 但基于不同人仕的年及度数的差异,手术后,病人可能在某些场合如长时间阅读或晚间驾驶时仍需佩戴眼镜。
- Methods:The visual acurities of 84 cases(118 eyes) with optic disk abnormality and refractive error were corrected by adjusting the diopter of spectacles. 方法:对84例传统检影试镜方法视力得不到矫正,视盘形状异常者,调整屈光镜片。
- Conclusion:It is important to know well the shape of disk and the rule of correction the refractive error for prevention and cure the strabismus and amblyopia. 结论:了解视盘形状及屈光镜片的调整规律，对防治斜视、弱视有重要意义。
- Methods Infrared and vernier means were used in the examination of dark focus.The stability, relationship between dark focus and refractive error were studied. 方法：主要用激光散斑法和游标法进行暗焦点检查，并在与屈光不正的关系及仪器的稳定性进行了应用研究。
- This，combined with the information provided by the studies described above，emphasizes the role of optical defocus in inducing refractive error change. 结合前面讲到的，这突出了光学离焦在引起屈光不正病因中的重要作用。
- ionosphere refraction error 电离层折射误差
- Compared to other corneal surgery techniques, LASIK is by far more accurate, creates scant little scarring, is easily repeatable, and can correct a much larger range of refractive error. 跟其他角膜手术相比,丽晰远较精准,且留下极少疤痕,亦可重复施行,同时能矫正幅员较广的屈光不正问题。
- Objective To investigate the variation of the refractive errors in the middle and old-aged. 目的了解中老年人屈光不正变化规律。
- ionospheric refraction correction 电离层折射改正
- Objective To evaluate the effects of conventional therapy on refractive errors in patients with amblyopia. 摘要目的探讨屈光不正性弱视的临床疗效。
- Anisometropia means an unequal refractive error in the two eyes. Actually，no two eyes are exactly alike，so a refractive difference becomes important only if it leads to symptoms. 双眼的屈光不正程度不同称为屈光参差。实际上几乎没有人的两只眼睛的屈光状态是完全一致的，所以只有当屈光参差导致临床症状时才有意义。
