Patent ID: 7072104

Claim:
An operation microscope comprising: an observation optical system including an objective lens opposed to an eye to be operated; an illumination optical system for guiding illumination light from a light source to a vicinity of an optical axis of the observation optical system; and a deflection means for deflecting the illumination light guided to the vicinity of the optical axis of the observation optical system by the illumination optical system and guiding the illumination light to the eye to be operated through the objective lens, wherein the deflection means includes a pair of deflection members which are a first deflection member for guiding a first part of the illumination light at a predetermined oblique angle with respect to the optical axis of the observation optical system and a second deflection member for guiding a second part of the illumination light at an oblique angle substantially equal to the predetermined oblique angle with respect to the optical axis simultaneously with guiding of the first part of the illumination light by the first deflection member, the second deflection member being disposed in an opposite side to the first deflection member so as to sandwich the optical axis of the observation optical system therebetween, wherein the deflection means further includes a third deflection member that guides a third part of the illumination light to the eye to be operated at an oblique angle larger than those for the pair of deflection members with respect to the optical axis of the observation optical system, the operation microscope further comprising: an emitting region adjusting means for adjusting an emitting region of the illumination light from the light source selected from one of the 1st, 2nd, and 3rd or plural deflection members by switching one part of the illumination light so as to cope with the shape of the deflection members to be guided to the eye to be operated.