This narrative review presents a comprehensive examination of optical coherence tomography angiography (OCTA), a non-invasive retinal vascular imaging technology, as reported in the existing literature. Building on the coherence tomography principles of standard OCT, OCTA further delineates the retinal vascular system, thus offering an advanced alternative to conventional dye-based imaging. OCTA provides high-resolution visualisation of both the superficial and deep capillary networks, an achievement previously unattainable. However, image quality may be compromised by factors such as motion artefacts or media opacities, potentially limiting the utility of OCTA in certain patient cohorts. Despite these limitations, OCTA has various potential clinical applications in managing retinal and choroidal vascular diseases. Still, given its considerable cost implications relative to current modalities, further research is warranted to justify its broader application in clinical practice.

Background The Veterans Health Administration (VA) is undergoing a transformation in how healthcare is organized and provided. This transformation to a Whole Health System of Care encompasses the integration of complementary and integrative health services, education, and Whole Health coaching to develop Veterans’ self-care skills. During the COVID-19 pandemic, these services were provided via telehealth (tele-WH). Objective We sought to understand Veteran and provider perspectives on how tele-WH impacts Veteran engagement in Whole Health-aligned services and the impact on their well-being. Methods Semi-structured interviews were conducted with 51 providers who delivered tele-WH at 10 VA Medical Centers (VAMCs) and 19 Veterans receiving tele-WH at 6 VAMCs. Participants were asked about their experiences with tele-WH, what they perceived to be the impact of tele-WH on Veterans, and their preferences moving forward. Interviews were transcribed, and a content analysis was performed using a rapid approach. Results We identified 3 major themes that describe the perceived impact of tele-WH on Veterans. These include: (1) increased use of Whole Health-aligned services; (2) deeper engagement with Whole-Health aligned services; and (3) improvements in social, psychological, and physical well-being. Conclusion Tele-WH is perceived to be a strong complement to in-person services and is a promising mechanism for improving engagement with Whole Health-aligned services and promoting Veteran well-being. Future research is needed to measure outcomes identified in this study and to support more equitable access to telehealth for all.

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OCTA is an imaging modality used in the assessment of the retinal vasculature. It operates on the principle of coherence tomography used in standard OCT with the addition of delineating the retinal vascular. This provides a modern non-invasive retinal vascular imaging method compared to conventional dye-based imaging. High quality depth resolution of the superficial and deep capillary networks is possible on OCTA whereas this was not possible prior. OCTA may be limited by image quality degradation from factors such as motion artefact or media opacities, and therefore may not be the investigation of choice for all patient groups. There are multiple potential clinical applications for OCTA in retinal and choroidal vascular disease. Ongoing research is necessary to substantiate the more widespread use of OCTA due to its significant cost burden compared to current modalities.