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The ametropia incidence rate in Lanzhou area is similar to that in other domestic areas. It is necessary to take certain interventions to protect the visual power of high middle school students.

兰州市中学生屈光不正发病率与国内其它地区类似,采取一定的干预措施保护中学生的视力是有必要的。

However, the operative site in optical center, the influence of the operator and the equipment, make almost all patients have the different degrees of ametropia and asthenopia and influence the recovery of the vision. These questions are very difficult to solve.

但手术部位多在光学中心,加之手术人员、设备等诸多因素的影响,几乎所有患者术后均存在不同程度的屈光不正而影响视力恢复,并引起不同程度的视疲劳,一直是眼科界难以解决的问题。

The results of corneal topography, that of keratometer and cycloplegic retinoscopy in measuring astigmatism before refractive surgery were compared, and the measuring results of corneal topography and that of keratometer for 72 eyes after photorefractive keratectomy and 95 eyes after laser in situ keratomileusis were also compared.

采用计算机辅助的角膜地形图、角膜曲率计及散瞳验光三种测量散光的方法,对屈光不正患者360只眼进行检查,同时对准分子激光角膜切削术(photorefractive keratectomy,PRK)后72只眼和准分子激光原位角膜磨镶术(excimer laser in situ keratomileusis,LASIK)后95只眼的角膜散光用角膜地形图和角膜曲率计进行测量并比较。

This new model eye can simulate the different state of refractive error, and offer the assistance for the teachers to demonstrate retinoscopy to students, which is an effective approach to solve the problem to observe the diverse movement of reflective light from model eye.

这种新型检影模拟眼不但能够模拟各种人眼屈光不正,而且该装置可以提供示教功能,能够提高检影验光学习的效率,使眼视光学检影验光教育培训带来了全新的方法成为可能,为解决检影模拟眼影动观察的示教提供了有效办法。

Objective To investigate the feasibility of using progressive addition lenses in the treatment of children with hyperopic amblyopia determined by a standard refraction test.

目的 探讨规范化验配的远视渐变多焦镜治疗儿童远视引起的屈光不正性弱视的可行性。

Methods The 201 cases in 1979~1996 were retrospectively summarized. The clinical features including chief complaints, sex distribution, age at first visit, laterality, type of presentation, ocular deviation in the primary position, refractive errors, amblyopia, globe retraction, change of the palpebral fissure, upshoot and downshoot in adduction, binocular single vision, and its associated ocular and non-ocular anomalies were analyzed.

自1979~1996年回顾性地总结了201例DRS,对它的临床特征,包括主诉、性别分布、初诊年龄、侧向状态、表现类型、原在位的眼位偏斜、屈光不正、弱视、眼球后退、睑裂改变、内转时眼球急速上转和下转、双眼单视及其伴随的眼部和非眼部异常等予以分析。

To enlarge the measurement range of a potential vision meter and improve its measurement accuracy for patients with high error of refraction, the imaging characteristics of its optical system were investigated. The visual magnification equation of the system was derived. The influence of the focal length variation of the collimating lens and the imaging lens on the magnification was analyzed respectively.

针对潜在视功能检测仪临床使用中量程有限和对高度屈光不正患者检测结果有一定误差的现象,研究了其光学系统成像特性,建立了系统对视力板成像的视觉放大率公式,分析了准直透镜、成像透镜焦距变化对视觉放大率的影响。

The explanations of the phenomena of sight put forward by Young, von Graefe, Helmholtz and Donders have caused us to ignore or explain away a multitude of facts which otherwise would have led to the discovery of the truth about errors of refraction and the consequent prevention of an incalculable amount of human misery.

阳·冯·格雷夫、赫尔姆霍茨和唐德斯对视觉现象的解释,使我们不再理会或辩护大量的事实,否则,就会导致屈光不正真相的发现,并相应的预防一个无法估量的人类苦难。

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