An intraocular pressure monitoring device has a soft contact lens and a pressure sensor united with the contact lens, the pressure sensor comprising an active strain gage, a passive gage, a rigid element and a microprocessor. The active strain gage, passive gage and rigid element are placed at a distance from the center of the contact lens, the active strain gage comprising a portion encircling the center of the contact lens on at least 180°, wherein the passive gage and the rigid element each comprise a portion encircling the center of the contact lens on at least 180°, and wherein the portion of the passive gage situated around the center of the contact lens is placed in immediate vicinity of the portion of the rigid element situated around the center of the contact lens. A kit has such a pressure monitoring device and a portable recording device configured for communicating with the pressure monitoring device and for storing data received from it. An intraocular pressure monitoring system has such a kit and a computing device configured for communicating with the portable recording device for receiving and/or processing and/or storing data received from the portable recording device.