The Asia-Pacific Journal of Ophthalmology

Asia-Pacific Journal of Ophthalmology:

Issue 1, January/February 2018 Review Article

Use of OCTA, FA, and Ultra-Widefield Imaging in Quantifying Retinal Ischemia: A Review

Or, Chris; Sabrosa, Almyr S.; Sorour, Osama; Arya, Malvika; Waheed, Nadia



Author Information


From the *New England Eye Center, Tufts Medical Center, Boston, Massachusetts; and †Institute Ophthalmology Rio de Janeiro/Hospital da Gamboa, Rio de Janeiro, Brazil.


Reprints: Nadia Waheed, MD, MPH, New England Eye Center at Tufts Medical Center, 260 Tremont Street, Boston, MA 02111. E-mail: nadiakwaheed@gmail.com.



Abstract


As ischemia remains a key prognostic factor in the management of various diseases including diabetic retinopathy, an increasing amount of research has been dedicated to its quantification as a potential biomarker. Advancements in the quantification of retinal ischemia have been made with the imaging modalities of fluorescein angiography (FA), ultra-widefield imaging (UWF), and optical coherence tomography angiography (OCTA), with each imaging modality offering certain benefits over the others. FA remains the gold standard in assessing the extent of ischemia. UWF imaging has allowed for the assessment of peripheral ischemia via FA. It is, however, OCTA that offers the best visualization of retinal vasculature with its noninvasive depth-resolved imaging and therefore has the potential to become a mainstay in the assessment of retinal ischemia. The primary purpose of this article is to review the use of FA, UWF, and OCTA to quantify retinal ischemia and the various methods described in the literature by which this is achieved.




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