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Comparison of Biometric Measurements and IOL Power Calculation Between a Swept-Source OCT and an Optical

Daniel Romero1, Carlos E Monera1, David Cooke2

  • 1Department of Ophthalmology, General University Hospital of Elche, Elche Foundation for the Promotion of Health and Biomedical Research in the Valencian Region (FISABIO), Valencia, Spain.

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Summary
This summary is machine-generated.

The Anterion swept-source OCT biometer and Lenstar LS900 OLCR biometer show good correlation but are not interchangeable for cataract surgery measurements. Adjust intraocular lens constants for accurate IOL power calculations.

Keywords:
IOL power calculationLenstar LS900anterionbiometrycataract surgeryoptical low-coherence reflectometryswept-source optical coherence tomography

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Area of Science:

  • Ophthalmology
  • Biomedical Engineering
  • Medical Devices

Background:

  • Accurate preoperative biometry is crucial for successful intraocular lens (IOL) implantation in cataract surgery.
  • Comparing different biometry devices is essential to ensure consistent and reliable measurements.
  • Swept-source optical coherence tomography (SS-OCT) and optical low-coherence reflectometry (OLCR) are advanced technologies used for ocular measurements.

Purpose of the Study:

  • To evaluate the comparability of biometric measurements between the Anterion (SS-OCT) and Lenstar LS900 (OLCR) biometers.
  • To assess differences in key parameters like axial length, keratometry, and anterior chamber depth.
  • To determine if these devices are interchangeable for clinical use in preoperative cataract assessment.

Main Methods:

  • An observational study involving 150 cataract patients undergoing preoperative biometry.
  • Comparison of measurements for axial length (AL), mean keratometry (Km), anterior chamber depth (ACD), lens thickness (LT), and central corneal thickness (CCT) between Anterion and Lenstar LS900.
  • Statistical analysis using Bland-Altman plots to assess agreement and identify significant differences.

Main Results:

  • Axial length measurements showed no significant difference between the Anterion and Lenstar LS900.
  • Statistically significant differences were observed in anterior chamber depth and lens thickness, with Anterion yielding greater mean values.
  • Mean keratometry was significantly flatter with Anterion, and estimated intraocular lens power was higher, necessitating A-constant adjustments for interchangeability.

Conclusions:

  • While a good correlation exists between the Anterion and Lenstar LS900 biometers, they are not interchangeable due to significant differences in specific measurements.
  • Clinicians must adjust intraocular lens constants when switching between these devices to ensure accurate refractive outcomes.
  • Further research is needed to determine the superiority of either biometer in predicting refractive results post-surgery.