角膜前的

AbstractAIM: To explore some possible relative factors through measuring the anterior corneal asphericity factor Q in cataract and myopic eyes respectively.

目的：分别测量近视眼及白内障两组患者角膜前表面非球性系数，探讨可能的相关因素。

Abstract］ Objective To describe the shape of the planar space of the corneal anterior surface of children with emmetropia by using a conic section, and then to plot the changes in asphericity on 36 meridians to deduce the formulae of the three-dimensional shape of the corneal anterior surface.

目的 通过二次曲线方程来描述正视儿童角膜前表面的二维空间形态，根据各子午线非球面性的变化规律推导出其三维形态的数学表达式及非球面性变化规律表达式。

Paired Samples T test revealed that both the LT and VL decreased (P.01), the AD increased (P.01) after cycloplegia regardless of their refractive state. The AL increased for hyperopic eyes (P.05) and decreased for myopic eyes (P.01) after cycloplegia. For hyperopic eyes, the major keratometer K1 increased (P.05) while for myopic eyes, the major keratometer K1(P.05) and minor keratometer K2 (P.01) decreased after cycloplegia. The mean corneal power of zones 5 mm (MD5) and 7 mm (MD7) decreased with myopic eyes decreased dramatically (P.01). The mean refractive power of the lower half vertical meridian is greater than that of upper half; and the mean refractive power of the lateral half of the horizontal is greater than that of the medial half.

结果：不论远视眼、正视眼还是近视眼在睫状肌麻痹后前房加深（P.01），晶状体变薄（P.01），玻璃体腔径缩短（P.01）；但远视眼睫状肌麻痹后眼轴增长（P.05），近视眼眼轴缩短（P.01）；远视眼睫状肌麻痹后角膜曲率K1增加（P.05），近视眼睫状肌麻痹后除K1降低外（P.05），K2以及以角膜中心点为中心，直径为5mm、7mm的环平均角膜屈光度（MD5、MD7）均降低（P.01）；此外，垂直径线上方的平均角膜屈光度小于下方的平均角膜屈光度而水平径线鼻侧的平均角膜屈光度小于颞侧的平均角膜屈光度（P.01）。

The visual acuity, dioptometry and corneal topography were investigated in a 12-month follow-up study.results the postoperative visual acuity of the 56 eyes(84.8%)was equal to or above the best corrected visual acuity before lasik.conclusion lasik for ametropia after cataract extraction and intraocular lens implantation is an effective and safe surgery.but the indication must be selected appropriately.

观察视力、屈光状态、角膜地形图情况。结果 56眼（84.8%）lasik术后视力均达到或超过术前的最佳矫正视力，10眼（15.2%）lasik术后最佳矫正视力下降1～2行。结论 lasik是矫治白内障摘除人工晶体植入术后屈光不正的安全、有效的方法。

Irregular measure of myopia , emmetropia , hyperopia is no difference .

不同屈光不正角膜前表面的不规则件是一致的。

During your presurgical eye exam, your eye doctor uses highly specialized instruments to determine which specific areas of your cornea need to be flattened or curved. This allows your eye doctor to chart your eye and remove tissue from your cornea very precisely.

你的眼科医生在手术前的眼睛测试时使用很专业的仪器确定手术面积——需要变平或者变弯的角膜面积，然后绘制你的眼睛图，并且从角膜上精确地移除组织。

Purpose: To investigate the preoperative keratometer value and axial length in cataractous eyes within one year by Dr.

目的：研究白內障病人白內障手术前的角膜曲度及眼轴长度。

The formulae of the anterior surface are ellipsoids, with the major axis on the Z axis and the short axis on the Y axis.

正视儿童角膜前表面为长轴在Z轴、短轴在Y轴的长椭球面。

Results It was revealed that corneal vascularization,large graft,previous keratifis,eccentric graft,second graft and risk factors for corneal graft rejection.Prorking factors were described as an epithelium falling,corneal disease recuring,repeating grafting and the removing of the suture.

结果 统计分析结果表明：血管化角膜、大植片移植、植床术前的活动性炎症、偏中心移植、多次移植、联合手术均应视为穿透角膜移植术后免疫排斥反应的高危因素，而移植片上皮反复脱落、旧病复发、术眼再次手术、缝线松解与拆线等可能是诱导排斥反应发生的促发因素。

Methods Using the corneal topography analysis system, changes in topographic parameters and best corrected visual acuity were analyzed before surgery and 3 months after the surgical removal of pterygia in 56 eyes.

对56例(56眼)翼状胬肉行手术切除，分别于术前、术后使用角膜地形图仪进行检测，记录术前、术后第3个月的角膜地形图主要参数、最佳矫正视力，术前和术后以角膜地形图及综合验光仪验光法确定角膜散光情况，并进行统计学分析。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。