A system for implanting an intraocular pressure, IOP, sensor in an eye of a patient, the system comprising: an implantation device having a distal tip configured to penetrate through a conjunctiva and a sclera of the eye along a pars planar region and into the vitreous body of the eye; and a sensor device disposed in the implantation device, the sensor device having an IOP sensor in a distal portion thereof and one or more anchoring members in a proximal portion thereof, wherein the IOP sensor comprises a sensing diaphragm (s) disposed in the distal portion, whereby the sensor device is configured such that, when implanted, the sensing diaphragm is configured to be disposed entirely within a vitreous body of the eye, thereby being configured to obtain a direct measurement of the IOP of the vitreous body, wherein the sensor device is disposed within the implantation device, and device the implantation device is configured to facilitate implantation of the sensor device through the sclera, being configured to to position the IOP sensor within the eye, with the one or more anchoring members being configured to be deployed along the sclera, such that the sensor device is anchored by engagement of the one or more anchoring members against the sclera thereby being configured to maintain the IOP sensor within the vitreous body of the eye, wherein the sensor device comprises a proximal extraction feature, wherein the implantation device comprises a pusher tool that interfaces with the proximal extraction feature, thereby being configured to facilitate insertion of the sensor device along an insertion axis extending into the vitreous body, by advancing the pusher tool of the implantation device interfaced with the proximal extraction feature. an implantation device having a distal tip configured to penetrate through a conjunctiva and a sclera of the eye along a pars planar region and into the vitreous body of the eye; and a sensor device disposed in the implantation device, the sensor device having an IOP sensor in a distal portion thereof and one or more anchoring members in a proximal portion thereof, wherein the IOP sensor comprises a sensing diaphragm (s) disposed in the distal portion, whereby the sensor device is configured such that, when implanted, the sensing diaphragm is configured to be disposed entirely within a vitreous body of the eye, thereby being configured to obtain a direct measurement of the IOP of the vitreous body, wherein the sensor device is disposed within the implantation device, and device the implantation device is configured to facilitate implantation of the sensor device through the sclera, being configured to to position the IOP sensor within the eye, with the one or more anchoring members being configured to be deployed along the sclera, such that the sensor device is anchored by engagement of the one or more anchoring members against the sclera thereby being configured to maintain the IOP sensor within the vitreous body of the eye, wherein the sensor device comprises a proximal extraction feature, wherein the implantation device comprises a pusher tool that interfaces with the proximal extraction feature, thereby being configured to facilitate insertion of the sensor device along an insertion axis extending into the vitreous body, by advancing the pusher tool of the implantation device interfaced with the proximal extraction feature.