Repeatability of 2 swept-source OCT biometers and 1 optical low-coherence reflectometry biometer

Area of Science:

• Ophthalmology
• Biomedical Engineering
• Medical Devices

Background:

• Accurate ocular biometry is crucial for successful cataract surgery outcomes.
• Advancements in biometry devices, including swept-source optical coherence tomography (SS-OCT) and optical low-coherence reflectometry (OLCR), aim to improve measurement precision.
• Comparing the repeatability of these technologies is essential for clinical adoption.

Purpose of the Study:

• To compare the repeatability of two SS-OCT biometers (IOLMaster 700 and ANTERION) and one OLCR device (LENSTAR LS900).
• To evaluate the precision of key biometric parameters: keratometry, central corneal thickness, anterior chamber depth (ACD), lens thickness (LT), and axial eye length (AL).

Main Methods:

• A prospective study involving 50 patients scheduled for cataract surgery.
• Three consecutive measurements were taken with each of the two SS-OCT devices and the OLCR device.
• Repeatability was assessed using within-subject standard deviation (Sw) and coefficient of variation (CoV).

Main Results:

• All devices exhibited high repeatability, with CoV values below 0.5 for most parameters.
• SS-OCT devices generally showed lower Sw values for keratometry, ACD, and AL compared to the OLCR device.
• The ANTERION (SS-OCT) demonstrated the highest repeatability for ACD (Sw=0.004).

Conclusions:

• Both SS-OCT biometry devices offer excellent repeatability for ocular measurements.
• SS-OCT technology demonstrates a higher repeatability performance than OLCR for key biometry variables.
• These findings support the clinical utility of SS-OCT devices in optimizing cataract surgery planning.