Provided is an ophthalmological device with which it is possible to clearly detect the three-dimensional distribution of blood vessels in an eye. In an ophthalmological device of an exemplary embodiment, a storage unit stores a three-dimensional data set acquired by applying optical coherence tomography to a subject's eye. A first blood vessel region extraction unit extracts a blood vessel region from the three-dimensional data set. A first layer region specification unit applies segmentation to the three-dimensional data set and specifies a plurality of layer regions. A first common region specification unit specifies common regions between each of the layer regions and the blood vessel region. A first en face image formation unit forms en face images on the basis of each of the common regions. A first color coding unit assigns different color information to the plurality of en face images formed by the first en face image formation unit. A first image compositing unit forms a composite en face image by compositing at least two of the plurality of en face images whereto the color information is assigned.
