Optical coherence tomography angiography (OCTA) may be as an important tool in the management of patients with glaucoma, according to Robert L. Stamper, MD.
The technology, which relies on the acquisition of sequential OCT B-scans and one cross-sectional layer of the retina, compares each of the sequential scans with each other.
Any observed differences between the scans are considered to have resulted from movement because the tissue structure does not change. Most of the commercially available devices can shorten the scanning time to acquire about 70,000 B-scans per second during the three seconds required to obtain a scan.
Following acquisition, computerized motion-correction and eye-tracking are performed to ascertain that eye movements are not responsible for any movement perceived by the computer, he explained.