Repeatability of pentacam AXL in determining axial length and ocular indices in people with irregular cornea

Aims/Purpose: To determine the repeatability of Pentacam AXL in determining ocular axial length and some corneal indices in people with irregular corneas.Methods: Ocular biometry using Pentacam AXL underwent in this study. The Pentacam AXL measurements were done 3 times 10‐minutes apart. To evaluate the repeatability, the intraclass correlation coefficient (ICC), were calculated.Results: In this study, 141 eyes of 141 individuals with irregular cornea aged 60 to 91 years (64 ± 15.7) were included. The ICC of axial length, flat keratometry, steep keratometry, anterior chamber depth, central corneal thickness and corneal diameter measurements were 0.957, 0.981, 0.989, 0.980, 0.923 and 0.981 respectively. In cases with long axial length (>24.5mm) the ICC of axial length, flat keratometry, steep keratometry, anterior chamber depth, central corneal thickness and corneal diameter measurements were 0.427, 0.946, 0.993, 0.988, 0.861 and 0.989 respectively.Conclusions: The results of this study showed that generally Pentacam AXL has a high repeatability in measuring the axial length and some corneal indices of the eye in irregular corneas. However, it should be note that Pentacam AXL has no repeatability in irregular corneas with long axial length.