Measurement of corneal astigmatism  

作　　者：Kui Zhang Zhihui Li Wenxiu Lu Rong Xing 

机构地区：[1]Beijing Tong Ren Hosp, Dept Ophthalmol, Beijing 100730, Peoples R China [2]Minist Elect Ind, Res Inst 6, Beijing 100083, Peoples R China

出　　处：《Chinese Science Bulletin》1998年第13期1124-1128,共5页

摘　　要：Cornea is the most important optical surface in the eye dioptric system. Three kinds of methods in measuring corneal astigmatism were used. Three hundred and sixty eyes suffered ametropia were selected on a random basis. Computer_assisted corneal topographic system was compared with keratometer and cycloplegic retinoscopy in measuring corneal curvature. There was no statistical difference in axes of astigmatism among the three groups. It is thought that ΔSim \%K\% could show the corneal regular astigmatism. As for diopters of astitigmatism, no difference was found between the groups of corneal topography and keratometer, but there was a significant difference between the group of cycloplegic retinoscopy and the other two groups. It was demonstrated that keratometer could function similarly as the corneal topography. However, it measured only four points from a small region of the cornea and was limited in measuring slight changes in corneal curvature. Some discussion was also made about the graphic patterns and ΔSim \%K\% in corneal topography.Cornea is the most inportant optical surface in the eye dioptric system. Three kinds of methods in measuing corneal astigmeatism wre used. Three hundred and sixty eyes suffered ametropia were selected on a random basis. Computer-assisted corneal kpographic system was compared with keratometer and cycloplegic retinoscopy in measuring corneal curvature. There was no statistical dieme in axes of astigmatism among the three garps. It is thought that ΔKsm could show the comeal regular astignatism. As for dimd of astitignatism, no Difference was found between the groups of corneal topography and keratometer, but there was a significant difference between the group of cycloplegic retinoscopy and the other two groups. It was demonstrated that keratometer could function similarly as the corneal topography. However, it measued only fcur points fron a small region d the cornea and was limited in measuring slimt changes in corneal curvature. Some discussion was also mede abart the gaphic patterns and Δsim in corneal topography.

关 键 词：CORNEAL TOPOGRAPHY keratometer ASTIGMATISM CYCLOPLEGIC retinoscopy. 

分 类 号：R770.4[医药卫生—眼科]