Fourier domain controlled optical coherence tomography (OCT)

In ophthalmology, OCT is used for early glaucoma diagnosis, profound retinal and corneal examination.
Mainly in this diagnosis, the back of the eye (retina, optic nerve) is examined. Here, reflections at interfaces of the eye are measured with different refractive indices and thus a three-dimensional image is reconstructed.

Such a reconstruction is called tomography. The technology of OCT has a very wide range of applications, is non-contact and non-invasive compared to other diagnostics.