There is provided a method of controlling an ophthalmicdevice having a first retinal image acquisition module operable to image animaging region of a retina and an illumination module operable toconcurrently illuminate an illumination region of the retina, the imagingregionand the illumination region having a predetermined positional relationshipto one another, the method comprises: controlling (S10) the first retinalimage acquisition module to acquire a reference retinal image by imaging areference imaging area of the retina； designating (S20) a target in thereference retinal image； controlling (S30) the first retinal image acquisitionmodule to acquire a current retinal image of an initial imaging regionwithin the reference imaging area； controlling (S40) the first retinal imageacquisition module to move its imaging region of the retina from the initialimaging region to a destination imaging region using the target and at leasta portion of the reference retinal image, and to acquire a retinal image ofthe destination imaging region； controlling (S50') the illumination moduleto illuminate the illumination region of the retina while the imaging regionof the first retinal image acquisition module is the destination imagingregion； controlling (S60') the first retinal image acquisition module toacquireone or more retinal images while the illumination module is illuminatingthe illumination region of the retina； and comparing (S70) a marker retinalimage based on the one or more retinal images with a comparison imagebased on at least a portion of the reference retinal image to determine amarker that is indicative of the position of the marker retinal image withinthe comparison image.
