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Related Experiment Video

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Doppler Optical Coherence Tomography of Retinal Circulation
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Golden angle based scanning for robust corneal topography with OCT.

Joerg Wagner1, David Goldblum2, Philippe C Cattin1

  • 1Department of Biomedical Engineering, University of Basel, Allschwil, Switzerland.

Biomedical Optics Express
|March 9, 2017
PubMed
Summary

This study introduces a novel scanning method for optical coherence tomography (OCT) corneal topography. It enables reliable corneal analysis even from partial scans, reducing repeat measurements due to eye blinks.

Keywords:
(100.6950) Tomographic image processing(170.4470) Ophthalmology(170.4500) Optical coherence tomography(170.4580) Optical diagnostics for medicine

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Area of Science:

  • Ophthalmology
  • Biomedical Optics
  • Medical Imaging

Background:

  • Corneal topography is vital for diagnosing eye conditions and planning surgeries.
  • Optical coherence tomography (OCT) offers potential for corneal topography but is limited by scan disturbances, such as eye blinking, leading to unusable data.
  • Current methods struggle to evaluate partially corrupted OCT scans.

Purpose of the Study:

  • To develop a new scanning method for reliable corneal topography using optical coherence tomography (OCT).
  • To address the challenge of evaluating partially corrupted scans caused by involuntary eye movements.
  • To improve the robustness and efficiency of OCT-based corneal topography.

Main Methods:

  • A novel scanning method based on the golden angle distribution of scan points was developed.
  • The method ensures a balanced and refining scan point distribution over time, maintaining balance even with missing data.
  • Performance was evaluated through numerical simulations and measurements on test surfaces.

Main Results:

  • The new method demonstrated numerically well-conditioned and reliable corneal topography reconstruction from partial scans.
  • The technique effectively handles partially corrupted data, overcoming limitations of existing methods.
  • Reduced need for repeat measurements was observed in the presence of abrupt disturbances like blinking.

Conclusions:

  • The proposed golden angle-based scanning method significantly enhances the reliability of OCT corneal topography.
  • This approach offers a robust solution for obtaining accurate corneal data despite scan interruptions.
  • The method improves diagnostic and surgical planning capabilities by ensuring data integrity.