Objective To compare the corneal curvature (K1,K2) measurements obtained with Lenstar with those measured with IOL-Master,keratometer and Pentacam.Methods In this prospective nonrandomized clinical study,total 141 eyes of 84 subjects were enrolled.K1 and K2 were measured with Lenstar,IOL-Master,keratometer and Pentacam,separately.The differences between two methods were assessed using the paired t test,its correlation was evaluated by Pearson coefficient,and the agreement analysis was performed by Bland-Alrman plots.Results K1 value was (43.59±1.69)D,(43.54±1.73)D,(43.55±1.78)D and (43.30±2.08)D,and K2 value was (44.55±1.66)D,(44.61±1.72)D,(44.27±1.74)D and (44.24±2.02)D based on Lenstar,IOL-Master,keratometer and Pentacam,respectively.All comparisons showed a non-significant difference,except for the comparison of K2 measurements using the Lenstar and keratometer (P ＜0.001).All biometry measurements revealed good linear correlation (r =0.899-0.980,P ＜0.001).The Bland-Altman showed that the four devices had non-comparable results for corneal curvature measurement.Conclusions Lenstar can provide noncontact biometry measurements easily and safely,which are welcome by patients.It is important to note in clinical practice,that corneal curvature values acquired by these devices are not directly interchangeable.