The invention is directed to a method for ascertaining and/or tracking the position of characteristic components of the eye during an examination or treatment of the eye. To this end, a digital image of at least one section of an eye is recorded using the camera. According to the invention, said image is correlated with an annular comparison object of defined size and the position of the characteristic component of the eye is derived from the positions of comparison object and image, wherein coarse correspondence results between image and comparison object.
