Comparison of 2 swept-source optical biometers: IOLMaster 700 vs. Revo FC 130

To evaluate the measurement accuracy of 2 swept-source optical biometers, the IOLMaster 700 and the Revo FC 130, in patients diagnosed with cataracts.

We conducted a prospective, observational and comparative study in patients older than 40 years with cataracts. A single operator performed optical biometry using both devices during the same session. Cataract grading was conducted using the Lens Opacities Classification System III.

Biometric measurements were obtained from the 504 eyes of 279 patients, with a mean age of 70.93 ± 8.41 years. Statistically significant differences were found between the IOLMaster 700 and Revo FC 130 in the following parameters: mean keratometry (43.53 ± 1.56 vs 44.27 ± 1.68 diopters), total average keratometry and mean keratometry (43.56 ± 1.55 D vs 44.27 ± 1.67 diopters), white-to-white distance (11.98 ± 0.52 vs 12.66 ± 0.73 mm), and lens thickness (4.53 ± 0.40 vs 4.60 ± 0.40 mm). No significant differences were found in axial length (23.31 ± 0.96 vs 23.25 ± 1.01 mm) or anterior chamber depth (3.02 ± 0.38 vs 3.02 ± 0.37 mm), which were not clinically relevant. No statistically significant differences were found between the IOLMaster 700 measurements of total mean keratometry (43.53 ± 1.56 diopters) and mean keratometry (43.56 ± 1.56 diopters).

Although most measurements do not reveal any clinically relevant differences, the 2 devices should not be used interchangeably, mainly due to variations in keratometry readings.