Intraocular pressure measuring and/or monitoring device comprising a soft contact lens and a pressure sensor united with the soft contact lens, the pressure sensor being located such that it is applied against an eye of a user for sensing the intraocular pressure (IOP) of the eye when the soft contact lens is worn by the user, wherein the soft contact lens is softer than a surface of the eye and is configured to adapt its shape to the shape of the eye under the effect of capillary force maintaining the contact lens on the eye when the user is wearing the contact lens.