1. An image processing apparatus for processing a tomogram of an eye fundus, the apparatus comprising: a memory; and a processor that is in communication with the memory, the processor being configured to function as units comprising: (a) a feature acquisition unit configured to acquire anatomical features of the tomogram; (b) a morbid portion acquisition unit configured to detect a first morbid portion and a second morbid portion from a plurality of layers specified by the anatomical features acquired by said feature acquisition unit; (c) a determination unit configured to determine whether or not the first morbid portion and the second morbid portion exist on an identical tissue structure; (d) a generation unit configured to generate a composite image by projecting information of the tissue structure, the first morbid portion and the second morbid portion detected by said morbid portion acquisition unit, and a result determined by said determination unit onto a predetermined two-dimensional image; and (e) a display unit configured to display the composite image generated by said generation unit, wherein said determination unit determines whether or not the first morbid portion and the second morbid portion exist on an identical tissue structure in accordance with x,y-coordinate information of each of the first morbid portion and the second morbid portion.