Optical coherence tomography (OCT) is an imaging technique that uses light to create detailed images of body tissues. While OCT is a common term used among medical professionals, there are various synonymous terms that can describe this technique. Optical coherence microscopy (OCM) uses the same principles as OCT, but at a higher resolution, making it useful for visualizing smaller structures within tissues. Optical frequency domain imaging (OFDI) is another term for OCT that emphasizes the use of frequency-domain analysis to generate the images. Other synonymous terms include: low-coherence interferometry, optical reflectometry, and optical time-domain reflectometry. All of these terms describe different aspects of the same underlying technology.