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Related Experiment Video

Updated: Feb 26, 2026

In vivo Structural Assessments of Ocular Disease in Rodent Models using Optical Coherence Tomography
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Three-dimensional OCT based guinea pig eye model: relating morphology and optics.

Pablo Pérez-Merino1, Miriam Velasco-Ocana1, Eduardo Martinez-Enriquez1

  • 1Instituto de Óptica "Daza de Valdés," Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain.

Biomedical Optics Express
|July 25, 2017
PubMed
Summary

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Spectral Optical Coherence Tomography (SOCT) accurately measured guinea pig eye 3-D morphology. Findings reveal low variability and high repeatability, crucial for understanding ocular development and aberrations.

Area of Science:

  • Ophthalmology
  • Biomedical Optics
  • Animal Models

Background:

  • Understanding ocular development and aberrations is crucial for vision research.
  • Accurate 3-D morphological measurements are essential for studying eye development.

Purpose of the Study:

  • To measure the 3-D morphology of guinea pig eyes using Spectral Optical Coherence Tomography (SOCT).
  • To assess intraocular variability, repeatability, and aberrations in guinea pig ocular surfaces.

Main Methods:

  • Custom Spectral Optical Coherence Tomography (SOCT) with automated quantification and distortion correction.
  • In vivo measurements of awake guinea pigs (30 and 40 days old) under cyclopegia.
  • Analysis of corneal, anterior lens, and posterior lens radii, surface elevation, and Zernike terms.
Keywords:
(100.2960) Image analysis(110.4500) Optical coherence tomography(110.6880) Three-dimensional image acquisition(330.5370) Physiological optics(330.7324) Visual optics, comparative animal models(330.7327) Visual optics, ophthalmic instrumentation

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Main Results:

  • Low intraocular variability was observed (<4% for corneal/anterior lens radii, <8% for posterior lens radii, <1% for interocular distances).
  • Surface elevation repeatability was less than 2 µm.
  • Surface astigmatism was the dominant term; higher-order RMS surface elevation was greatest in the posterior lens.

Conclusions:

  • Custom SOCT provides precise and repeatable 3-D morphological measurements of guinea pig eyes.
  • Ocular surface aberrations, particularly astigmatism, are significant in young guinea pigs.
  • Findings align with predictions from OCT-based eye models, validating the methodology.