How Does OCT Work? OCT works similarly to an ultrasound. It provides real-time images of your eye's internal structures like an ultrasound, but OCT uses light waves instead of sound waves. These light waves illuminate and scan your retina, giving your optometrist a detailed view.

What is the principle of OCT?

The principle of OCT is white light, or low coherence, interferometry. The optical setup typically consists of an interferometer (Fig. 1, typically Michelson type) with a low coherence, broad bandwidth light source. Light is split into and recombined from reference and sample arm, respectively.

How does an OCT camera work?

Optical coherence tomography (OCT) [1,2] is an imaging technique which works similar to ultrasound, simply using light waves instead of sound waves. ... Three-dimensional images can then be created by scanning the light beam laterally across the sample surface.