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Related Experiment Video

Updated: May 3, 2026

Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy oSLO and Optical Coherence Tomography OCT
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A dual-modal retinal imaging system with adaptive optics.

Alexander Meadway, Christopher A Girkin, Yuhua Zhang

    Optics Express
    |February 12, 2014
    PubMed
    Summary

    This study introduces a dual-mode adaptive optics scanning laser ophthalmoscope (AO-SLO) for high-resolution retinal imaging. The system achieves single-cell resolution in both en face and cross-section planes, enhancing diagnostic capabilities for retinal diseases.

    Area of Science:

    • Ophthalmology
    • Biomedical Engineering
    • Optical Imaging

    Background:

    • Adaptive optics scanning laser ophthalmoscopy (AO-SLO) provides high-resolution en face retinal imaging.
    • Optical coherence tomography (OCT) offers cross-sectional imaging of retinal structures.
    • Integrating AO-SLO and OCT can provide complementary information for retinal analysis.

    Purpose of the Study:

    • To develop a dual-modal AO-SLO and OCT system for simultaneous en face and cross-section retinal imaging.
    • To implement a novel spectral shaping technique for improved OCT imaging quality.
    • To demonstrate the system's capability for single-cell level retinal imaging in vivo.

    Main Methods:

    • An existing AO-SLO system was adapted to incorporate OCT imaging capabilities.

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  • The same light source, scanning optics, and adaptive optics were utilized for both AO-SLO and OCT.
  • A new spectral shaping method combining two digital techniques was developed to reduce OCT sidelobes.
  • The inner segment/outer segment junction of individual photoreceptors was measured.

    • Main Results:

    • A dual-modal system capable of acquiring both en face and cross-section retinal images at the single-cell level was successfully developed.
    • The novel spectral shaping method effectively reduced sidelobes in OCT imaging with minimal noise introduction.
    • In vivo imaging of healthy and diseased human retinas demonstrated the system's clinical potential.
    • Precise measurements of photoreceptor inner segment/outer segment junction thickness and position were achieved.

    Conclusions:

    • The integrated AO-SLO/OCT system offers a powerful tool for high-resolution, multi-planar retinal imaging.
    • The developed spectral shaping technique enhances OCT image quality, particularly with non-ideal light sources.
    • This technology has significant potential for advancing the diagnosis and understanding of retinal diseases.