1. A method for realizing ocular fundus images that are corrected for scattered light using a digital fundus camera, the method comprising: a) illuminating the ocular fundus by application of an illumination source located within the digital fundus camera and directed through optics of the digital fundus camera into an eve and onto the ocular fundus, and b) capturing a digital image of the ocular fundus through the optics of the digital fundus camera in which an imaged surface area of the ocular fundus is larger than an illuminated surface area of the ocular fundus, wherein in the digital image of the ocular fundus realized in b) a scattered light intensity is determined and is used for a correction, the method further comprising c) defining, by application of the digital fundus camera, measurement points or a measurement area, the measurement points or the measurement area for determining the scattered light intensity being located in a non-illuminated area of the ocular fundus adjacent to or surrounding the illuminated area of the ocular fundus; d) in the case of measurement points in the non-illuminated area of the ocular fundus, eliminating outliers and after the outliers have been eliminated, averaging values of scattered light intensity determined at said measurement points to determine an averaged scattered light intensity by application of the digital fundus camera; and e) using the average scattered light intensity thus determined to correct said image of the ocular fundus realized in method step b) or to define the severity of a cataract by application of the digital fundus camera.