查询词典 emmetropia

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。

Objective:To study the corneal topography of children who are emmetropia and that of myopia.

目的：研究儿童正视眼与儿童近视眼的角膜地形图特征并进行比较。

Results: Of 4 218 students who presented with complete eyesight results, 775 were with emmetropia and 2 888 with myopia (68.50%).

结果：验光数据完整的4 218名学生中正视的有775人，近视的学生为2 888人，患病率为68.50%。

Methods:115 emmetropia eyes and 115 myopia eyes were measured by using a computerized corneal topography.

应用计算机辅助的角膜地形图检测分析了115只儿童正视眼和115只儿童轻中度近视眼。

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。

Myopia children has slightly higher AMP than Emmetropia ones.

近视儿童的AMP与正视儿童的有一定的差异性。

The "emmetropia" in geometrical optics and "the normal eye of refraction" in biomedicine were two different concepts, and should be differentiated.

几何光学的"正视眼"与生物医学角度的屈光"正常眼"是两个不同概念，应予以区分

Object To study the shape feature of the children′s corneal surface emmetropia with keratometry and corneal topography.

目的 应用角膜曲率计与角膜地形图仪研究儿童正视眼角膜表面形态特征。

Results The axial length of eyeball was gradually decreased during the adult years of life accompanying with the increases of corneal and lens refractive powers and a decrease of anterior chamber depth fur maintaining a emmetropia status, and the steepness and thickness of lens, shallowness of anterior chamber contributed to emmetropia by decreasing the refractive index of lens.

结果 随着年龄增大，眼轴逐渐变短，但同时伴有角膜、晶状体屈光力的增大及前房深度的变浅以维持正视状态，晶状体的增厚、曲率的变大及前房的变浅可能通过屈光指数的减小同样维持了正视状态。

The corneal suface of children with emmetropia has toric shape. There is a fine coincidence between two methods in central corneal power. The corneal surface of children with emmetropia has the feature of irregularity and non-spherical surface.

儿童正视眼角膜表面呈托力克光学面；角膜曲率计与角膜地形图仪对于中央区角膜曲率测量有很好的一致性；儿童正视眼角膜表面具有一定的不规则性(CIM约0.63)和非球面特性(SF约为0.27)。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。