An ophthalmic device to measure the weakness of the Zinns zonule of an examinees eye, comprising: an illuminating unit arranged to illuminate the examinees eye including a lens an imaging unit including an imaging element and arranged to capture an image of an anterior segment illuminated by the illuminating unit and a determination unit arranged to process the image of the anterior segment captured by the imaging unit after applying a stimulus to guide the lens to move, the determination unit being further configured to obtain positional information of a characteristic point of the lens to detect mobility of the lens relative to the pupil when the lens returns to a pre-stimulus status, and determine the zonular weakness based on the detected mobility.
