OPHTHALMIC OPERATION MICROSCOPE AND EXTENSION UNIT OF OPHTHALMIC OPERATION MICROSCOPE

摘要

PROBLEM TO BE SOLVED: To provide an ophthalmic operation microscope and an extension unit of the ophthalmic operation microscope which can present an astigmatism axis position in an image to be observed of an eye to undergo an operation observed via an eyepiece part of the microscope in an intraocular lens insertion operation aiming at correction of corneal astigmatism.SOLUTION: The ophthalmic operation microscope and the extension unit thereof include: a first index projection means to project a first index on the cornea of an eye to be operated; a first index detection means to detect a reflection image of the first index projected on the cornea by the first index projection means; a calculation means to calculate the astigmatism axis of the cornea on the basis of the position relation of the reflection image of the first index, a second index projection means to project a plurality of second indices on the cornea corresponding to the astigmatism axis of the cornea separate from the first index, and a third index projection means to project a third index on the cornea along the optical axis of the eye to be operated separate from the first and the second indices.