Abstract: A base for ophthalmological instruments includes a housing within which is mounted a guide plate to which an ophthalmological instrument may be attached. The guide plate extends through an opening in the side of the housing and is mounted on bearings which permit translational movement of the plate along coordinate axes x-y to thereby permit adjustment of the instrument as desired by the physician. The upper surface of the housing serves as a table and a control arm connected to the guide plate extends across the table. A control lever mounted in gimbals on the control arm is provided for fine adjustment of the guide plate. Means are provided for locking the guide plate in any position of adjustment.