A system for controlling glare in oculars of a surgical microscope, the system comprising: a surgical microscope comprising an objective lens and an infinity space above the objective lens, the infinity space being configured to receive an accessory therein and the presence of the accessory altering a glare management system of the surgical microscope by displacing the position of the objective lens of the surgical microscope, characterized in that the system further comprises: a second field diaphragm positioned along an optical axis of a microscope illumination system, the second field diaphragm comprising: a frame portion received by the surgical microscope; and a non-circularly symmetric mask portion integrated with the frame portion, the mask portion aligned such that marginal rays from an edge of the field diaphragm along a meridian of minimum diameter that reflect from a surface of an objective lens of the microscope reflect outside of an acceptance angle for relay through any ocular channel of the microscope, and wherein the second field diaphragm is configured to block portions of the illumination beam to reduce back reflections from the displaced objective lens, wherein a first field diaphragm is positioned within the path of the illumination system when the surgical microscope is operated without the optical accessory coupled to the imaging path of the microscope; and wherein the second field diaphragm is positioned within the path of the illumination system and adjacent to the first field diaphragm when the surgical microscope is operated with the optical accessory coupled to the imaging path of the microscope. a surgical microscope comprising an objective lens and an infinity space above the objective lens, the infinity space being configured to receive an accessory therein and the presence of the accessory altering a glare management system of the surgical microscope by displacing the position of the objective lens of the surgical microscope, characterized in that the system further comprises: a second field diaphragm positioned along an optical axis of a microscope illumination system, the second field diaphragm comprising: a frame portion received by the surgical microscope; and a non-circularly symmetric mask portion integrated with the frame portion, the mask portion aligned such that marginal rays from an edge of the field diaphragm along a meridian of minimum diameter that reflect from a surface of an objective lens of the microscope reflect outside of an acceptance angle for relay through any ocular channel of the microscope, and wherein the second field diaphragm is configured to block portions of the illumination beam to reduce back reflections from the displaced objective lens, wherein a first field diaphragm is positioned within the path of the illumination system when the surgical microscope is operated without the optical accessory coupled to the imaging path of the microscope; and wherein the second field diaphragm is positioned within the path of the illumination system and adjacent to the first field diaphragm when the surgical microscope is operated with the optical accessory coupled to the imaging path of the microscope. a frame portion received by the surgical microscope; and a non-circularly symmetric mask portion integrated with the frame portion, the mask portion aligned such that marginal rays from an edge of the field diaphragm along a meridian of minimum diameter that reflect from a surface of an objective lens of the microscope reflect outside of an acceptance angle for relay through any ocular channel of the microscope, and wherein the second field diaphragm is configured to block portions of the illumination beam to reduce back reflections from the displaced objective lens, wherein a first field diaphragm is positioned within the path of the illumination system when the surgical microscope is operated without the optical accessory coupled to the imaging path of the microscope; and wherein the second field diaphragm is positioned within the path of the illumination system and adjacent to the first field diaphragm when the surgical microscope is operated with the optical accessory coupled to the imaging path of the microscope.