Abstract
Purpose :
To evaluate the agreement in ocular biometry outcomes measured by 3 different devices, 1 using partial coherence interferometry (IOL Master 500), 1 using swept-source optical coherence tomography (IOL Master 700), and 1 using optical low-coherence reflectometry (Lenstar LS900) and to compare the refractory outcomes after cataract surgery obtained by those three devices.
Methods :
This retrospective study reviewed medical records of 178 eyes from 89 patients who underwent ocular biometry with IOL Master 500, IOL Master 700, and Lenstar LS900. Axial length (AL), mean keratometry (Km) and anterior chamber depth (ACD) measurements were statistically compared using Bland-Altman plots. We compared the refractive outcomes of each device with respect to the error in predicted spherical equivalent after implantation of a monofocal aspheric intraocular lens (Tecnis ZCB00) in 54 eyes.
Results :
IOL Master 500 failed to measure AL in 12 eyes, while IOL Master 700 failed in 3 eyes, and Lenstar LS900 failed in 5 eyes. Ocular biometry measurements by those three devices showed high agreement and narrow 95% limits of agreement. AL measured by Lenstar LS900 was longer than that measured by IOL Master 500 with a mean difference of 0.012 mm (p < 0.001) and IOL Master 700 with a mean difference of 0.011 mm (p = 0.002). Km measured by IOL Master 500 was steeper than that measured by IOL Master 700 and Lenstar LS900 (p = 0.001, p < 0.001, respectively). ACD measured by IOL Master 500 was shorter than that measured by IOL Master 700 and Lenstar LS900 (p < 0.001, p < 0.001, respectively). Absolute prediction errors by 3 devices showed no difference after cataract surgery.
Conclusions :
IOL Master 700 and Lenstar LS900 demonstrated a superior ability to successfully take biometric measurements compared to IOL Master 500. Ocular biometry by 3 different devices showed high agreement, although statistically significant differences were observed, while there was no difference in predicting the refractive outcomes, those differences are clinically negligible.
This abstract was presented at the 2019 ARVO Annual Meeting, held in Vancouver, Canada, April 28 - May 2, 2019.