简介：AIM:Toevaluatetheinterchangeabilityofkeratometricandasphericitymeasurementsprovidedbythreemeasurementsystemsbasedondifferentopticalprinciples.METHODS:Atotalof40eyesof40patientswithameanageof34.1ywereincluded.Inallcases,acornealcurvatureanalysiswasperformedwithIOL-Master(IOLM),iDesign2(ID2),andSiriussystems(SIR).Differencesbetweeninstrumentsforflattest(K1)andsteepest(K2)keratometricreadings,aswellasformagnitudeandaxisofcornealastigmatismwereanalyzed.Likewise,differencesinasphericity(Q)betweenSIRandID2werealsoevaluated.RESULTS:MeandifferencesbetweendevicesforK1were0.20±0.21(P<0.001),-0.12±0.36(P=0.046)and-0.32±0.36D(P<0.001)forthecomparisonsIOLM-SIR,IOLM-ID2andSIR-ID2,respectively.Therangesofagreementforthesecomparisonsbetweeninstrumentswere0.41,0.70,and0.70D.ForK2,meandifferenceswere0.31±0.33(P<0.001),-0.08±0.43(P=0.265)and-0.39±0.38D(P<0.001),withrangesofagreementof0.65,0.84,and0.74D.Concerningmagnitudeofastigmatism,rangesofagreementwereinthelimitofclinicalrelevance(0.49D,P=0.011;0.55D,P=0.386;0.43D,P=0.05).Incontrast,rangesofagreementwereclinicallyrelevantforastigmaticaxis(26.68o,33.83oand18.37o,P≥0.121)andforQbetweenSIRandID2(0.16,P<0.001).CONCLUSION:Thekeratometriccornealpower,astigmaticaxisandasphericitymeasurementsprovidebythethreesystemsevaluatedcannotbeconsideredasinterchangeable,whereasmeasurementsofcornealastigmatismobtainedwithSIRandID2canbeconsideredasinterchangeableforclinicalpurposes.

简介：AIMTo分析在眼睛的biomechanical和眼睛的生物测定的数据之间的关联，在健康subjects.METHODSThree上由基于Scheimpflug的设备测量了连续大小用角膜的可视化Scheimpflug技术(CorVis圣)被执行健康眼睛上的设备和10个设备特定的参数被记录。Pentacam导出HR的参数(前面、以后的表面上的角膜的弯曲半径；顶端的pachymetry；角膜的体积；角膜的错误数据；前面的房间的深度，体积和角度)并且从IOLMaster的轴的长度(AL)与10特定的CorVis圣parameters.RESULTSMeasurements被相关在43个志愿者的43只眼睛被进行(年龄61.24楴湯污?H