An apparatus comprising: an optical imaging device including: front optics configured to receive electromagnetic radiation and focus the electromagnetic radiation onto an intermediate focal plane; an optical deflector unit; and an eyepiece configured to focus the electromagnetic radiation from the intermediate focal plane to an eye of an operator and produce a exit pupil located remote from the eyepiece; an infrared illuminator unit configured to project infrared electromagnetic radiation onto the eye of the operator of the optical imaging device; an eye-shift sensor unit configured to produce an image of the eye illuminated by said infrared illuminator unit, the image of the eye including a spot representative of the exit pupil; and a digital image processor unit coupled to the eye-shift sensor unit and configured to receive and process the image of the eye to determine an offset between an iris of the eye and the exit pupil, and to generate feedback data based on the offset; wherein the optical deflector unit is coupled to the digital image processor unit and includes a field lens positioned between the intermediate focal plane and the exit pupil, proximate the intermediate focal plane, the optical deflector unit being configured to receive the feedback data from the digital image processor unit, and to decenter the field lens in two orthogonal axes relative to an optical axis of the optical imaging device to relocate the exit pupil of the optical imaging device responsive to the feedback data to reduce the offset between the iris of the eye and the exit pupil. an optical imaging device including: front optics configured to receive electromagnetic radiation and focus the electromagnetic radiation onto an intermediate focal plane; an optical deflector unit; and an eyepiece configured to focus the electromagnetic radiation from the intermediate focal plane to an eye of an operator and produce a exit pupil located remote from the eyepiece; front optics configured to receive electromagnetic radiation and focus the electromagnetic radiation onto an intermediate focal plane; an optical deflector unit; and an eyepiece configured to focus the electromagnetic radiation from the intermediate focal plane to an eye of an operator and produce a exit pupil located remote from the eyepiece; an infrared illuminator unit configured to project infrared electromagnetic radiation onto the eye of the operator of the optical imaging device; an eye-shift sensor unit configured to produce an image of the eye illuminated by said infrared illuminator unit, the image of the eye including a spot representative of the exit pupil; and a digital image processor unit coupled to the eye-shift sensor unit and configured to receive and process the image of the eye to determine an offset between an iris of the eye and the exit pupil, and to generate feedback data based on the offset; wherein the optical deflector unit is coupled to the digital image processor unit and includes a field lens positioned between the intermediate focal plane and the exit pupil, proximate the intermediate focal plane, the optical deflector unit being configured to receive the feedback data from the digital image processor unit, and to decenter the field lens in two orthogonal axes relative to an optical axis of the optical imaging device to relocate the exit pupil of the optical imaging device responsive to the feedback data to reduce the offset between the iris of the eye and the exit pupil.