Fourier-domain OCT apparatus for Optoretinography

A Fourier-domain optical coherence tomography, FD-OCT, apparatus arranged to acquire optoretinography, ORG, data that is indicative of a physiological response of a retina of an eye of a subject to an optical stimulus, the FD-OCT apparatus comprising:

• a fixation target arranged to fix a gaze direction of the eye;
• an optical system operable to apply the optical stimulus to the retina such that an illumination of the retina by the optical stimulus is confined to a portion of the retina, the optical system being controllable to vary a location on the retina at which the optical stimulus is to be applied;
• an FD-OCT imaging system operable to acquire OCT data by imaging a portion of the retina of the eye;
• and
• a controller arranged to:
• acquire an indicator of a target location on the retina at which the optical stimulus is to be applied by the optical system;
• use the acquired indicator to control the optical system, while a position of the fixation target relative to the eye remains fixed, to apply the optical stimulus to a first portion of the retina which is at the target location;
• control the FD-OCT imaging system to acquire OCT data of a second portion of the retina, wherein at least a part of the second portion of the retina is disposed in relation to the first portion so as to be stimulated by the applied optical stimulus during acquisition of at least some of the OCT data;
• and
• generate the ORG data based on the acquired OCT data.