PURPOSE:

To evaluate the accuracy of intraocular lens (IOL) power calculation formulas

from two biometers using swept-source optical coherence tomography

for quadrifocal Acrysof IQ Panoptix TFNT IOL (Alcon Laboratories,

Inc) implantation in patients with visually significant cataract with previous corneal refractive surgery.

METHODS:

This retrospective study comprised 50 eyes from 50 patients

with a history of corneal refractive surgery and TFNT IOL implantation.

Candidate formulas were Shammas-PL and Barrett True-K in the Argos (Movu, Inc),

Barret True-K and Haigis-L in the IOLMaster 700 (Carl Zeiss Meditec AG),

and Haigis using the total keratometry (TK) mode in the IOLMaster 700.

The main outcome measure was the mean absolute error (MAE) detected at postoperative 6 months.

The refractive accuracy was also evaluated as number and percentage of eyes within ±0.25, ±0.50, and ±0.75 diopters (D) of the prediction error.

RESULTS:

The uncorrected distance and near visual acuity were 0.32 ± 0.34 and 0.46 ± 0.20 logMAR at baseline,

and significantly improved to 0.04 ± 0.07 and 0.03 ± 0.06 logMAR at postoperative 6 months (P < .001 for all analysis)

with a mean spherical equivalent of −0.20 ± 0.39 D. The MAE was smallest for the Barrett True-K formula in the IOLMaster 700 (0.36 ± 0.26 D)

and largest for the Shammas-PL formula in the Argos (0.59 ± 0.37 D). The Barrett True-K formula from both devices showed that 90% of eyes were within ±0.75 D of MAE.

CONCLUSIONS:

The visual and refractive outcomes of TFNT IOL implantation in patients

with previous corneal refractive surgery were favorable. The Barrett True-K formula

in the IOLMaster 700 showed the best refractive outcome for TFNT IOL implantation.