The slit-lamp is turned on and off and the light intensity
is controlled by the unit mounted below the table.
The movement of the slit-lamp biomicroscope laterally
and in and out controlled by the joystick. The vertical adjustment is accomplished by twisting the joystick-clockwise to raise and counter-clockwise to
lower.
The unit can be locked so it does not move by
the small knob near the table top on the right side.