Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1992-09-25
1994-05-10
Bertsch, Richard A.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
351221, 606 4, A61B 310
Patent
active
053112245
ABSTRACT:
An optical ophthalmic treatment apparatus comprises: a slit illuminating light beam projecting optical system having a reflecting member for reflecting a narrow illuminating light beam toward a patient's eye to illuminate the patient's eye; a stereomicroscopic observation optical system for observing the patient's eye; a first therapeutic light beam projecting optical system for introducing a first therapeutic light beam through a position on the side of an operator with respect to the reflecting member into the stereomicroscopic observation optical system; a light path deflecting optical element capable of being inserted in and retracted from a plane including the light paths of the stereomicroscopic observation optical system, of transmitting at least part of the narrow illuminating light beam and of reflecting a second therapeutic light beam; and a second therapeutic light beam projecting optical system for projecting the second therapeutic light beam which is reflected toward the patient's eye by the light path deflecting optical element inserted in the stereomicroscopic observation optical system. Thus, the optical ophthalmic treatment apparatus is capable of satisfactorily and selectively using different therapeutic light beams and has a simple construction.
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Bertsch Richard A.
Nidek Co. Ltd.
Richman Howard R.
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