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Related Experiment Videos

Ocular component measurement using the Zeiss IOLMaster.

Huan Sheng1, Carol A Bottjer, Mark A Bullimore

  • 1College of Optometry, The Ohio State University, Columbus 43210-1240, USA.

Optometry and Vision Science : Official Publication of the American Academy of Optometry
|January 30, 2004
PubMed
Summary
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Author's response.

Optometry and vision science : official publication of the American Academy of Optometry·2026

The IOLMaster, using partial coherence interferometry, offers superior repeatability for axial length measurement compared to ultrasound. Cycloplegia did not significantly affect IOLMaster axial length readings.

Area of Science:

  • Ophthalmology
  • Biomedical Optics
  • Medical Instrumentation

Background:

  • Axial length measurement is crucial for intraocular lens calculations.
  • Traditional A-scan ultrasound has limitations in repeatability.
  • Partial coherence interferometry offers a novel approach to axial length measurement.

Purpose of the Study:

  • Compare the repeatability of IOLMaster and A-scan ultrasound for axial length measurement.
  • Evaluate the agreement between IOLMaster and ultrasound.
  • Assess the impact of cycloplegia on IOLMaster measurements.

Main Methods:

  • 20 young adults underwent repeated axial length and anterior chamber depth measurements using IOLMaster and A-scan ultrasound.
  • Measurements were taken by experienced and inexperienced observers across two sessions.

Related Experiment Videos

  • The effect of 1% tropicamide cycloplegia on IOLMaster readings was investigated.

    • Main Results:

    • IOLMaster demonstrated superior repeatability for axial length compared to ultrasound.
    • Agreement between IOLMaster and ultrasound was modest.
    • Cycloplegia did not significantly alter IOLMaster axial length measurements but did increase anterior chamber depth readings.

    Conclusions:

    • The IOLMaster's enhanced repeatability supports its adoption as the standard for axial length measurement.
    • Cycloplegic IOLMaster measurements correspond to a refractive error change of +/-0.12 D.