Optical Coherence Tomography is an advanced imaging technique that is noninvasive. It uses rays of light to scan and obtain high resolution cross-sectional imaging of the retina. The layers of the retina can be visualized, measured and organized to create 2D and 3D representations of the retina.
OCT testing has become a standard of care for the assessment and treatment of most retinal conditions. See the video below for a demo.