An apparatus (14) for optical coherence tomography, OCT, of one eye (16), comprising: - a camera system (18) configured to capture camera images (20, 22) resolved at the time of the eye ( 16), - an OCT image acquisition unit (26) configured to acquire OCT images (28) resolved at the time of the eye (16), wherein a measuring axis (30) of the unit (26) of OCT image acquisition and a measuring axis (32) of the camera system (18) are aligned along a common measuring axis (34) of the apparatus (14) using a beam splitter (36), and - a control unit (24) configured: - to determine, from the camera images (20, 22) resolved in time data of movements resolved in time representing an eye movement (16) in relation to the axis of measurement (34) of the apparatus (14), - to transform at least a fraction of the OCT images (28) on the basis of motion data , and - to generate an eye tomogram (16) from the OCT images (28), characterized by a plurality of light bulbs (40) arranged in a geometric design of light focus around the measurement axis (34 ) of the apparatus (14), the light bulbs (40) being configured to illuminate the cornea (44) of the eye (16) such that the camera images (20, 22) resolved in time comprise a plurality of marks of light (42) in a circular design of light marking, wherein the control unit (24) is further configured to determine, as motion data, a spatial size resolved in time of a circular design (46) adjusted to the plurality of light marks (42), and wherein the control unit (24) is calibrated such that it is configured to assign for each spatial size of the circular design (46) adjusted to the light marks (42), a corresponding translation axis (z) of the eye (16) relative to the apparatus (14).Un aparato (14) para la tomografía de coherencia óptica, OCT, de un ojo (16), que comprende: - un sistema de cámaras (18) configurado para capturar imágenes de cámara (20, 22) resueltas en el tiempo del ojo (16), - una unidad (26) de adquisición de imágenes de OCT con
