ophthalmological device for examination and photography of the augenhintergrundes

摘要

An eye fundus observing optical system which can perform the diopter correction of the inner focus type by the construction that a relay lens system for forming a second fundus image from a first fundus image formed by an objective lens is constituted by two first and second positive lenses, and the front focus of the first lens is coincident with the back focus of the objective lens, and the second lens is movable in the direction of the optic axis. Further, in accordance with the diopter of the eye to be examined, the second lens is moved in the direction of the optic axis.