How much correction?
The question then arises about how much correction actually occurs?
In the macula, there is not much difference, but going past the macular arcades, there is “quite a significant difference,” Dr. Waheed emphasized. She and her colleagues found differences ranging from 12% to 20% in the areas outside the macula in the montaged images.
After the distortion is corrected in the ultrawide FA images, various factors, such as vessel density and vessel complexity, can be quantified. “This is increasingly important in patients with retinal vascular diseases, and when conducting clinical trials or providing clinical care for these patients with retinal vascular diseases,” Dr. Waheed added.
“Most commercially available OCT and OCTA devices can provide widefield OCTA through a combination of faster speeds, tracking, and the ability to montage images,” Dr. Waheed concluded. “In the future, this may revolutionize our ability to assess and quantify retinal vascular disease either in the clinical setting or in a clinical trial to evaluate the efficacy of certain drugs.”