Patent ID: 7408705

Claim:
A microscope for operation comprising: an observing optical system including an objective and a front lens and configured to observe a fundus of an eye to be operated upon; and an illuminating optical system which includes an illuminating light source, an illuminating field diaphragm and a slit plate having a slit hole, and is configured to direct an illuminating light emitted from the illuminating light source through the illuminating field diaphragm and the slit plate toward the fundus of the eye to be operated upon, the slit hole of the slit plate converting the illuminating light into a slit illuminating light; wherein said slit illuminating light illuminates the fundus through the objective and the front lens, wherein the front lens is disposed between said objective and said eye to collect said illuminating light and to guide the collected light to the fundus of said eye, wherein said slit plate is moved in a direction substantially vertical to an optical axis of the illuminating optical system for allowing said slit illuminating light of the slit plate to move on the fundus of said eye to observe the entire fundus, and wherein an anterior focus position (u 0 ) of the objective is conjugate with the illuminating field diaphragm and a retina of the fundus.