A microscope for ophthalmologic surgery is provided which can measure astigmatic axis angles with high accuracy regardless of the drawing positions of the patients eye in an image frame. Astigmatism distribution information 71 showing the distribution of the astigmatism parameters resulting from the power distribution of an imaging optical system at least is stored in the storage 70 of the microscope for ophthalmologic surgery 1. An astigmatism information calculating part 92 calculates astigmatism information based on images obtained by photographing the patients eye E with an imaging element 56a while light from the group of LEDs 131-i is being projected. An astigmatism information correcting part 93 corrects this astigmatism information based on the astigmatism distribution information 71.
