The invention relates to an implantable measuring device (1) for measuring the intraocular pressure at an ocular sclera (2), having pressure sensing means (5, 7) embedded in a pressure-transmitting housing (6) for biocompatible contacting of the ocular sclera (2), having at least one, preferably substantially flat, pressure sensor area (7) allowing reliable measurement of the intraocular pressure and that is as operatively simply applicable as possible, while avoiding the disadvantages of the state of the art, wherein it is proposed that the housing (6) is elastically dimensionally stable in design.
