METHODS: This study included 170 eyes of 143 patients diagnosed as cataract at Tangdu Hospital, Air Force Medical University. For each patient, anterior segment parameters were measured before surgery with Pentacam and IOL Master system, respectively.

RESULTS: There were no statistically significant differences in K1 and K2 values of eyes with long axial length(P>0.05). And there were statistically significant differences in K2 values(P<0.01), but not K1 values(P>0.05)of eyes with short and middle axial lengths. There were statistically significant differences in ACD values of eyes with any axial length(P<0.01). The Bland-Altman showed that ACD values of eyes with any axial length and K2 values of eyes with long and middle axial lengths were both in good agreement, and K1 values of eyes with any axial length were in great agreement.

CONCLUSION: Pentacam and IOL Master can be interchanged for keratometry in eyes with long axial length, but the measurements of keratometry in eyes with short and middle axial lengths and ACD of eyes with any axial length should be compared in clinical application.