Swept-source optical coherence tomography angiography of dia
A 52-year-old man was referred for evaluation of a swollen optic disc in both eyes. His best-corrected visual acuity was 20/40 in the right eye and 20/100 in the left eye. Fundus examination demonstrated a swollen optic disc, splinter hemorrhages, and radially oriented, dilated vessels over the optic disc in both eyes. Laboratory tests revealed previously unknown diabetes. SS-OCTA was performed to rule out neovascularization of the disc (NVD). B-scan image displayed blood flow signals in the thickened retinal nerve fiber layer of the optic disc and not above the vitreoretinal interface. They diagnosed the patient with Diabetic papillopathy.

OCTA has several advantages over FA in that it is non-invasive and faster. OCTA offers better clarity, quantitative measurements, and three-dimensional visualization of the retinal microvasculature. OCTA is a suitable technique to distinguish DP from NVD as it is unaffected by fluorescein leakage and can offer a clear image of the vascular details, like EVPs. In addition, OCTA also offers cross-sectional imaging which allows demarcation of the position of the microvasculature change above or below the VRI. The fine and radially oriented telangiectatic vessels in DP can be clearly visualized using OCTA and its location below VRI can also be confirmed. This is the first report that highlights that DP can be differentiated from NVD using SS-OCTA, which can be easily utilized in the clinical setting

Source: https://bmcophthalmol.biomedcentral.com/articles/10.1186/s12886-020-01470-5