Objective:

To compare the intraocular lens power calculated with the total refractive corneal power (TRCP), the effective keratometric readings (EKR) provided by the Holladay Report of the Pentacam-AXL topographer and the real corneal power (True K) used by the Barret True K formula incorporated in the equipment, with the values obtained by the clinical history method (CHM) in patients with previous photoablative surgery for myopia correction.

Method:

A cross-sectional study was carried out in 99 eyes of 52 myopic patients after photoablative surgery in the Refractive Surgery Department of the Ramón Pando Ferrer Institute from November 2018 to November 2019. Demographic, refractive and biometric characteristics were evaluated, including corneal powers obtained by the Pentacam-AXL. We compared corneal power and the intraocular lens power calculation.

Results:

Mean age was 25.71 ± 4.46 years, there was a female predominance (67.3%) and the spherical equivalent was -0.06 ± 0.34 diopters. There were only significant differences in mean keratometry (p = 0.02) and intraocular lens power calculated using keratometry (p < 0.01) compared with that calculated using the MHC; not so with EKR, TRCP and True K.

Conclusions:

The effective keratometric readings provided by the Holladay Report module of the Pentacam, the total corneal refractive power and the real corneal power used by the Barret True K formula, do not differ from the corneal power obtained by the MHC in eyes with previous photoablative surgery for myopia correction, so they can be used for intraocular lens calculation.

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