Clinical Report: Refocusing Retinal Imaging

Overview

A new study introduces a hybrid approach combining adaptive optics optical coherence tomography (AO-OCT) with computational aberration correction (CAC), enabling cellular-level resolution across the full retinal thickness from a single focus.

Background

Adaptive optics optical coherence tomography (AO-OCT) has advanced retinal imaging by allowing in vivo visualization of cellular structures. However, its clinical application has been limited by a shallow depth of focus, necessitating multiple acquisitions to capture full retinal thickness. The proposed CAC method addresses this limitation.

Data Highlights

The study demonstrated that CAC could achieve cellular-level resolution across the full retinal thickness from a single focus setting, particularly at the inner plexiform layer (IPL). In a patient with multiple sclerosis, CAC-enhanced imaging revealed a significant increase in cone contrast compared to uncorrected images.

Key Findings

• Combining hardware AO-OCT with CAC allows for digital extension of depth of focus from a single acquisition.
• Defocus correction alone is sufficient for image sharpness, with minimal benefit from higher-order aberration correction.
• Clear visualization of the photoreceptor mosaic was achieved even at 1.5° from the fovea.
• Simultaneous visualization of multiple retinal layers is possible in a single volumetric dataset.

Clinical Implications

Clinicians should ensure adequate signal acquisition, as CAC enhances image sharpness rather than signal quality.

Conclusion

The study presents advancements in retinal imaging through improved imaging efficiency and quality.

Related Resources & Content

1. Ophthalmology Management, Advances in retinal imaging, 2020 -- A review of recent advances in retinal imaging modalities.
2. Retinal Physician, Retinal Imaging Modalities: Advantages and Limitations for Clinical Practice, 2011 -- Insights on selecting appropriate imaging options.
3. Ophthalmic Professional, Update on Retinal Imaging, 2025 -- A look at evolving technologies in retinal imaging.
4. Ophthalmology Management — Spotlight on Technology & Technique
5. Diabetic Retinopathy Preferred Practice Pattern® - PubMed
6. Adaptive optics imaging in ophthalmology: Redefining vision research and clinical practice - ScienceDirect
7. Multifunctional adaptive optics optical coherence tomography allows cellular scale reflectometry, polarimetry, and angiography in the living human eye - PubMed