In 1991, optical coherence tomography (OCT) was initially introduced to image the transpar‐ ent tissue of eyes at a level of resolution significantly greater than conventional ultrasound technique. OCT uses infrared light to produce images on a micrometer scale. The intensity of the reflected light is displayed as a false color or grey scale image. OCT imaging is analo‐ gous to ultrasound B mode imaging, except that it performs imaging by measuring the in‐ tensity of reflected or back scattered light rather than acoustic.
