Features

New OCT in circulation

Instruments
An OCT adapted to allow visualisation of retinal and choroidal vasculature is put through its paces by Bill Harvey. Could this mean the end for fluorescein angiography he asks?

Maintenance of normal vision depends on an efficient and regulated blood supply to the retina. Compromise of this, as for example with vascular occlusions, haemorrhages, aneurysms or neovascular response to ischaemia, results in vision loss. Diagnosis, assessment of extent of disease and monitoring of the impact of treatments all require accurate visualisation of the vasculature.

Though ophthalmoscopy in its various forms will reveal major surface structural changes (haemorrhages, vessel calibre variation, absence of perfusion or atrophy), deeper lesions and anomalies are not easily seen and, even for visible superficial change, there is little indication of disruption extent beyond a subjective interpretation of often indistinct images.

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