1. The promise of spectral-domain optical coherence tomography

    Optical coherence tomography (OCT) was first reported in 1991 [1]. Since then, improved resolution and speed have enabled OCT to become widely used clinically in ophthalmology. The principle of OCT is analogous to that of ultrasonography, using light instead of sound to acquire high-resolution images of ocular structures. Until recently, clinically available OCT instruments have used a technique to obtain OCT images referred to as time-domain OCT (TDOCT). In TDOCT, low-coherence light is produced by a diode source coupled with a Michelson interferometer. The interferometer has a beam-splitter that divides the light beam into a reference and a scanning beam ...
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