An ocular prosthetic system, comprising: an implant marker configured to move with an orbital implant disposed in an eye socket of a subject; and an ocular prosthesis comprising: a housing having a form factor shaped to fit under an eyelid of the subject and in front of the orbital implant, wherein an anterior portion of the form factor is curved similar to an anterior portion of a natural or normal eyeball for the subject; a display device disposed within the housing and visible at an anterior portion of the housing; an implant detector disposed within the housing and configured to detect a position of the implant marker moving with the ocular implant when the housing is inserted under the eyelid of the subject and anterior to the orbital implant; and a processor disposed within the housing and configured to: determine, at least in part, a natural or human appearance for a visible portion of the eyeball of the subject based, at least in part, on the position of the implant marker, and render, at least in part, an image for presentation on the display device based on the natural or normal human appearance for the visible portion of the eyeball of the subject, including the position and movement of an image of an iris and a pupil in a display area of the display device. an implant marker configured to move with an orbital implant disposed in an eye socket of a subject; and an ocular prosthesis comprising: a housing having a form factor shaped to fit under an eyelid of the subject and in front of the orbital implant, wherein an anterior portion of the form factor is curved similar to an anterior portion of a natural or normal eyeball for the subject; a display device disposed within the housing and visible at an anterior portion of the housing; an implant detector disposed within the housing and configured to detect a position of the implant marker moving with the ocular implant when the housing is inserted under the eyelid of the subject and anterior to the orbital implant; and a processor disposed within the housing and configured to: determine, at least in part, a natural or human appearance for a visible portion of the eyeball of the subject based, at least in part, on the position of the implant marker, and render, at least in part, an image for presentation on the display device based on the natural or normal human appearance for the visible portion of the eyeball of the subject, including the position and movement of an image of an iris and a pupil in a display area of the display device. a housing having a form factor shaped to fit under an eyelid of the subject and in front of the orbital implant, wherein an anterior portion of the form factor is curved similar to an anterior portion of a natural or normal eyeball for the subject; a display device disposed within the housing and visible at an anterior portion of the housing; an implant detector disposed within the housing and configured to detect a position of the implant marker moving with the ocular implant when the housing is inserted under the eyelid of the subject and anterior to the orbital implant; and a processor disposed within the housing and configured to: determine, at least in part, a natural or human appearance for a visible portion of the eyeball of the subject based, at least in part, on the position of the implant marker, and render, at least in part, an image for presentation on the display device based on the natural or normal human appearance for the visible portion of the eyeball of the subject, including the position and movement of an image of an iris and a pupil in a display area of the display device. determine, at least in part, a natural or human appearance for a visible portion of the eyeball of the subject based, at least in part, on the position of the implant marker, and render, at least in part, an image for presentation on the display device based on the natural or normal human appearance for the visible portion of the eyeball of the subject, including the position and movement of an image of an iris and a pupil in a display area of the display device.