A device (2) for determining an intraocular pressure of an eye comprises a measurement arrangement with a measurement body (44), attached to a measurement arm (40), for applanation of the eye and a rotary knob (10) which is attached to a shaft (6). The measurement arm (40) is attached radially to a pivot axis (32) and the measurement arrangement comprises a mechanical coupling between the rotary knob (10) and the pivot axis (32), with a rotation of the rotary knob (10) being able to generate an applanation force required for applanation of the eye. The mechanical coupling comprises tension transmission means (12) attached to the pivot axis (32) via a first lever arm (34), and to the rotational axis (8) of the shaft (6) via a second lever arm (6).
