Comparing Predictive Accuracy of a Swept Source Optical Coherence Tomography Biometer and an Optical Low Coherence...

Area of Science:

• Ophthalmology
• Medical Devices
• Optical Engineering

Background:

• Accurate preoperative biometry is crucial for achieving desired refractive outcomes after cataract surgery.
• Swept-source optical coherence tomography (SS-OCT) and optical low coherence reflectometry (OLCR) are common biometry technologies.

Purpose of the Study:

• To compare the refractive accuracy of biometry measurements obtained from a swept-source optical coherence tomography (SS-OCT) biometer (Argos) versus an optical low coherence reflectometry (OLCR) biometer (Lenstar LS900) at one month postoperatively.

Main Methods:

• A retrospective comparative study analyzed 200 eyes undergoing preoperative biometry with both Argos and Lenstar LS900 devices.
• Data included postoperative prediction error (directional and absolute), keratometry (K), corneal astigmatism (delta K), axial length (AL), and anterior chamber depth (ACD).

Main Results:

• The mean directional prediction error was -0.15 ± 0.47 D for Argos and -0.31 ± 0.50 D for Lenstar LS900 (p < 0.001).
• The mean absolute prediction error was 0.35 ± 0.34 D for Argos and 0.42 ± 0.41 D for Lenstar LS900 (p < 0.001).
• Differences in prediction errors and preoperative measurements (K, AL, ACD) between the devices were not clinically significant.

Conclusions:

• Refractive prediction accuracy was statistically significant but not clinically different between the Argos (SS-OCT) and Lenstar LS900 (OLCR) biometers.
• Preoperative measurements of K, AL, and ACD also showed no clinically significant differences between the two devices.