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

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

Methods: 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.

Results: 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).

Conclusions: 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.