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Ocular biometric changes with different accommodative stimuli using swept-source optical coherence tomography.

Teresa Ferrer-Blasco1, José J Esteve-Taboada2, Daniel Monsálvez-Romín1

  • 1Department of Optics and Optometry and Vision Sciences, University of Valencia, C/Dr. Moliner, 50, 46100, Burjassot, Spain.

International Ophthalmology
|December 21, 2017
PubMed
Summary
This summary is machine-generated.

Accommodative stimuli cause minor changes in anterior chamber depth and lens thickness, measured by swept-source optical biometry. These ocular biometric shifts do not significantly impact intraocular lens power calculations.

Keywords:
AccommodationCataractOcular biometryOptical biometer

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Area of Science:

  • Ophthalmology
  • Biometry
  • Optical Engineering

Background:

  • Accurate ocular biometry is crucial for refractive surgery and intraocular lens (IOL) power calculation.
  • Accommodative stimuli can influence ocular parameters, potentially affecting measurement accuracy.
  • Swept-source optical biometry offers advanced capabilities for ocular measurements.

Purpose of the Study:

  • To evaluate changes in ocular biometrics using a novel swept-source optical biometer under varying accommodative stimuli.
  • To assess the clinical relevance of these biometric changes on intraocular lens power calculations.

Main Methods:

  • Measurements were taken using the IOLMaster 700 swept-source optical biometer.
  • Ocular parameters including axial length, anterior chamber depth, lens thickness, and others were recorded.
  • Biometric data were analyzed with subjects viewing the instrument's stimulus versus an external target at 0D vergence.

Main Results:

  • No significant differences were observed in axial length, corneal thickness, or keratometry readings.
  • A statistically significant reduction in anterior chamber depth (20 microns) and an increase in lens thickness (30 microns) were noted.
  • These changes in anterior chamber depth and lens thickness were highly correlated.

Conclusions:

  • While swept-source optical biometry detects significant changes in anterior chamber depth and lens thickness with accommodation, these variations are not clinically significant.
  • The observed biometric alterations do not substantially affect intraocular lens power calculations, ensuring reliable surgical outcomes.