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This study introduces a new real-time eye-tracking method for optoretinography (ORG) using adaptive optics scanning light ophthalmoscopy (AOSLO) to stabilize measurements. This technique improves the accuracy of optical coherence tomography (AOOCT) for studying retinal changes.

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Area of Science:

  • Ophthalmology
  • Biomedical Optics
  • Retinal Imaging

Background:

  • Optoretinography (ORG) measures retinal changes in response to light.
  • Adaptive optics optical coherence tomography (AOOCT) records photoreceptor ORGs by measuring outer segment length changes.
  • Eye motion presents a significant challenge for precise nanometer-scale ORG measurements.

Purpose of the Study:

  • To develop a real-time eye motion compensation system for high-speed ORG acquisition.
  • To enhance the accuracy and cellular-level targeting capabilities of AOOCT-based ORG.
  • To validate a novel ORG method against established techniques.

Main Methods:

  • An adaptive optics scanning light ophthalmoscope (AOSLO) was employed to track eye motion in real time.
  • The AOSLO system actively guided the AOOCT beam to compensate for detected eye movements.
  • High-speed ORG acquisition (up to 100 kHz) was achieved with precise control over scanning parameters.

Main Results:

  • The developed system successfully compensated for eye motion during AOOCT ORG acquisition.
  • Cellular-scale tracking enabled targeted ORG measurements with improved stability.
  • Cone classifications obtained using the new method showed strong agreement with established approaches.

Conclusions:

  • Real-time eye motion compensation using AOSLO significantly enhances AOOCT-based optoretinography.
  • This technique allows for high-speed, targeted ORG acquisition with cellular resolution.
  • The validated method offers a more robust approach for studying retinal physiology and pathology.