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Imaging of the whole anterior eye segment with full-range complex spectral domain optical coherence tomography

We demonstrate the capability of spectral domain optical coherence tomography (SD-OCT) with a full range complex (FRC) technique to image the anterior eye segment from the cornea to the back surface of the lens. We improved the spectrometer resolution with an adapted spectrometer design to achieve a single depth range of 7 mm in air. This depth range was doubled to an imaging range of 14 mm with a FRC-technique based on phase modulation introduced by off pivot point illumination of the galvanometer scanner. The performance of our system is demonstrated by recorded 2D and 3D datasets of the whole anterior eye segment of healthy human eyes in vivo. The system is also applicable to demonstrate the changes of the anterior eye segment during the accommodation of the eye.