An image processing apparatus (10) includes detection means configured to detect layers on the retina based on tomographic images of the retina, acquisition means (11) configured to acquire a region having a large curvature on the boundary surface between the retina and the corpus vitreum, and determination means (13) configured to determine an optic disc of the retina based on a region where a specific layer is not detected by the detection means and where the curvature acquired by the acquisition means is large.
