A rebound tonometer (100, 202, 300) comprising: a body (102, 206, 302) having a proximal end (110, 214) and a distal end (112, 216) opposite to the proximal end, wherein the body has an opening at the proximal end; a magnetic elongated probe (104, 208, 304) having a first end (116, 218) and a second end (118, 220) opposite to the first end, wherein the magnetic elongated probe is arranged at least partially in the body in a manner that the first end protrudes outside of the body from the opening of the body, the first end is at a first distance from the opening, and the second end is inside the body, and wherein the magnetic elongated probe is arranged to be aligned with and movable along an axis of the rebound tonometer; a measurement coil (106, 210, 306) and a drive coil (108, 212, 308) arranged inside the body and to partially surround the magnetic elongated probe; and a controller configured to: - detect a contact between an object and the first end, when the rebound tonometer is in use, by: - energizing the drive coil to move the magnetic elongated probe in respect to the body to have the first end at a second distance from the proximal end, the second distance being greater than the first distance; - measuring a first induced voltage in the measurement coil as a function of time during a first time period, and - comparing the measured first induced voltage as function of time with a predetermined criterion, and if based on the comparison the predetermined criterion is met, use it as an indication of a detected contact between the first end and the object; and - initiate a measurement cycle of the rebound tonometer when the contact is detected. a body (102, 206, 302) having a proximal end (110, 214) and a distal end (112, 216) opposite to the proximal end, wherein the body has an opening at the proximal end; a magnetic elongated probe (104, 208, 304) having a first end (116, 218) and a second end (118, 220) opposite to the first end, wherein the magnetic elongated probe is arranged at least partially in the body in a manner that the first end protrudes outside of the body from the opening of the body, the first end is at a first distance from the opening, and the second end is inside the body, and wherein the magnetic elongated probe is arranged to be aligned with and movable along an axis of the rebound tonometer; a measurement coil (106, 210, 306) and a drive coil (108, 212, 308) arranged inside the body and to partially surround the magnetic elongated probe; and a controller configured to: - detect a contact between an object and the first end, when the rebound tonometer is in use, by: - energizing the drive coil to move the magnetic elongated probe in respect to the body to have the first end at a second distance from the proximal end, the second distance being greater than the first distance; - measuring a first induced voltage in the measurement coil as a function of time during a first time period, and - comparing the measured first induced voltage as function of time with a predetermined criterion, and if based on the comparison the predetermined criterion is met, use it as an indication of a detected contact between the first end and the object; and - initiate a measurement cycle of the rebound tonometer when the contact is detected. - detect a contact between an object and the first end, when the rebound tonometer is in use, by: - energizing the drive coil to move the magnetic elongated probe in respect to the body to have the first end at a second distance from the proximal end, the second distance being greater than the first distance; - measuring a first induced voltage in the measurement coil as a function of time during a first time period, and - comparing the measured first induced voltage as function of time with a predetermined criterion, and if based on the comparison the predetermined criterion is met, use it as an indication of a detected contact between the first end and the object; and - energizing the drive coil to move the magnetic elongated probe in respect to the body to have the first end at a second distance from the proximal end, the second distance being greater than the first distance; - measuring a first induced voltage in the measurement coil as a function of time during a first time period, and - comparing the measured first induced voltage as function of time with a predetermined criterion, and if based on the comparison the predetermined criterion is met, use it as an indication of a detected contact between the first end and the object; and - initiate a measurement cycle of the rebound tonometer when the contact is detected.