曲率计

This paper presentes the spherometer of designed with the principle of Archimedes spiral, it has main advantage: both continuity measurement and direct reading to curvature radius of sphere, over against some classical instruments requested the conversion of the measuring result.

本文提出的应用阿基米德螺线原理设计的球面曲率计，克服了某些经典仪器需间接换算测量结果的缺陷，其主要优点是能直接读出所测球面的曲率半径和进行连续性测量，在使用上极为方便。

Spherometer ; Theory equation of sphere curvature radius ; Principle of Archimedes spiral.

球面曲率计；理论球径公式；阿基米德螺线原理

PCI can be an alternative method on routine ocular biometry of children instead of A-scan and auto-keratometry.

PCI测量的K值与曲率计测量结果无差异。PCI可以替代A超和曲率计，有望成为儿童眼球生物测量的常规方法。

This paper analyses the shape of Conjugate Curve of the profiee of pin tooth,develops the formula for computing the curvature of the comjugate curve, and completes the quantitative analysis of conjugate property of the circular arc and pin gears,This paper provides the theoretical foundation for the synthesis of circuler-arc and pin gear transmission.

本文分析了针齿齿廓的共轭曲线型式，推导了共轭曲线的曲率计算式；对圆弧针齿齿轮共轭性作了定量分析，为圆弧针齿传动的综合提供了理论依据。

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。

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。

Methods Corneal curve of sixty cases (115 eyes) of emmetropia was examined by keratometry and corneal topography respectively. The data of CIM and SF have been got also.

对60例(115眼)正视眼儿童进行角膜曲率计与角膜地形图仪测量，并得出角膜不规则指数与角膜表面形状系数。

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)。

Metholds 236 patients were performed penetrating keratoplasty, in which laser trephination technique was applied. Patients were assigned to four groups:(0) K0D, regular mire;(1) K60, moderately irregular mire;(3) severe irregular, immeasurable mire based on the keratometry value and mires measured with semi-quantitative Ophthalmometer (Type-H, 190071 Zeiss, Jena, Germany).

回顾分析了236例圆锥角膜使用激光环钻技术进行的穿透性角膜移植手术手术，使用角膜曲率计(Ophthalmometer， Type-H， 190071 Zeiss， Jena， Germany)对手术前后的角膜规则程度进行检测，并结合所测出的角膜曲率值和角膜映光图像分成4组：(0)规则组，K0D；(1)轻度不规则组，K0；(2)中度不规则组，K≥60；(3)重度不规则组，K值不能读出，共4组。

AIM: To compare the difference of keratometric value obtained from Orbscan-Ⅱanterior system、RKT-7700 auto and manual keratometer.

摘要目的：比较Orbscan眼前节系统与RKT-7700自动式角膜曲率计及手动式角膜曲率计测量角膜曲率的差异。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。