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Efficiency and measurements agreement between swept-source OCT and low-coherence interferometry biometry systems.

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Summary

The IOLMaster 700 and Aladdin biometers show good agreement for ocular measurements, with the IOLMaster 700 demonstrating superior performance in eyes with dense cataracts.

Keywords:
AladdinBiometryCataractIOLMaster

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Area of Science:

  • Ophthalmology
  • Biomedical Engineering
  • Optical Metrology

Background:

  • Accurate ocular biometry is crucial for refractive surgery and intraocular lens (IOL) power calculation.
  • Different biometry technologies, such as swept-source optical coherence tomography (OCT) and optical low-coherence interferometry (OLCI), offer distinct advantages and potential limitations.

Purpose of the Study:

  • To compare the agreement between swept-source OCT (IOLMaster 700) and OLCI (Aladdin) biometers.
  • To evaluate the performance of these devices in eyes with ocular media opacity.

Main Methods:

  • Fifty-five eyes underwent biometric measurements (axial length, corneal power, anterior chamber depth, etc.) using both the IOLMaster 700 and Aladdin.
  • Statistical analysis included paired t-tests, Bland-Altman analysis, and intraclass correlation coefficients (ICC).

Main Results:

  • Excellent agreement and correlation were observed for axial length, corneal power, and lens thickness between the two devices (ICC ≥ 0.952).
  • Statistically significant differences were found in anterior chamber depth and central corneal thickness, though with excellent correlation (ICC ≥ 0.938).
  • The IOLMaster 700 successfully measured all eyes, while the Aladdin failed in two cases with dense cataracts and reported spherical keratometry in 7.27% of cases.

Conclusions:

  • A good overall agreement exists between the IOLMaster 700 and Aladdin biometers.
  • The IOLMaster 700 is more effective for obtaining axial length measurements in eyes with dense cataracts.
  • The Aladdin device exhibited limitations in specific cases, particularly with significant ocular media opacity.