The invention relates to a method for non-invasive observations of a fundus using an ophthalmoscope (100), the method comprising:illuminating a retinal region of an eye (52) by projecting an illumination pattern of illumination light onto the retinal region of the eye (52)detecting at least a portion of fluorescent light emitted from the retinal region of the eye (52) and/or detecting at least a portion of illumination light reflected from the retinal region of the eye (52), thereby capturing a series of images of the retinal region of the eye (52) at a plurality of different relative positions of the retinal region of the eye (52) with respect to the illumination pattern projected onto the retinal region of the eye (52), wherein between the capturing of at least two images of the series the relative position of the retinal region of the eye (52) with respect to the illumination pattern projected onto the retinal region of the eye (52) is shifted in a non-controlled manner andprocessing the captured images to extract a sub-resolution image of the retinal region of the eye (52).The invention relates further to an ophthalmoscope (100) for non-invasive observations of a fundus, a computer implemented method for generating sub-resolution images of a fundus based on a plurality of captured images of the retinal region of the eye (52) obtained by an ophthalmoscope (100), and a corresponding computer program product.
