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Meta-analysis of optical low-coherence reflectometry versus partial coherence interferometry biometry.

Jinhai Huang1,2, Colm McAlinden1,3,4, Yingying Huang1

  • 1School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, Zhejiang, China.

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This meta-analysis found no significant differences in axial length, anterior chamber depth, or keratometry measurements between the Lenstar and IOLMaster biometry devices. However, white-to-white distance measurements showed a statistically significant difference between the two devices.

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Area of Science:

  • Ophthalmology
  • Biomedical Engineering
  • Medical Device Technology

Background:

  • Accurate ocular biometry is crucial for refractive surgery and intraocular lens (IOL) power calculations.
  • Two common devices for ocular biometry are the Lenstar LS900 (optical low-coherence reflectometry) and the IOLMaster (partial coherence interferometry).
  • Understanding the comparability of measurements between these devices is essential for clinical practice.

Purpose of the Study:

  • To compare ocular biometry measurements obtained from the Lenstar LS900 and the IOLMaster optical biometer.
  • To determine if measurements of axial length, anterior chamber depth, keratometry, and white-to-white distance are interchangeable between the two devices.

Main Methods:

  • A systematic literature search was performed across multiple databases (Cochrane Library, PubMed, Medline, Embase, China Knowledge Resource Integrated Database, Wanfang Data) up to August 6th, 2015.
  • A meta-analysis was conducted on 18 studies involving a total of 1921 eyes.
  • Statistical analysis included calculating mean differences (MD) and 95% confidence intervals (CI) for each biometric parameter.

Main Results:

  • No statistically significant differences were found for axial length (MD 0 mm; p=0.92), anterior chamber depth (MD 0.02 mm; p=0.67), flat keratometry (MD -0.05 D; p=0.39), steep keratometry (MD -0.09 D; p=0.13), and mean keratometry (MD -0.15 D; p=0.05).
  • A statistically significant difference was observed for white-to-white distance (MD -0.14 mm; p=0.02).

Conclusions:

  • Axial length, anterior chamber depth, and keratometry readings from the Lenstar and IOLMaster devices can be used interchangeably.
  • White-to-white distance measurements show a statistically significant difference between the two devices, suggesting caution in direct comparison.
  • These findings support the interchangeable use of both devices for most ocular biometry parameters in clinical settings.