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.