OCT Device and Probe Optical coherence tomography (OCT) is an emerging imaging modality that uses light to image turbid media such as living tissues, and has been successfully used to generate high resolution (~10 micron) cross-sectional images of tissue microstructure in the human retina and skin. OCT devices are now commercially available for ophthalmic and dermatologic use, and several clinical reports on the use of OCT in the vascular system and aerodigestive tract have been published as well.