OPHTHALMOLOGIC TRAINER Russian patent published in 1994 - IPC

FIELD: medicine. SUBSTANCE: ophthalmologic trainer has a base, two rods, rotary disks with a plurality of lenses of different focal power mounted on the rods, permanent magnets located on the disks for returning the latter into initial position, a mechanism for rotating the disks made in the form of a stepping motor, a control device comprising variable-ratio frequency divider with variable duty cycle connected in series to two amplifiers the outputs of which are connected to the windings of stepping motors. The device furthermore has a pulse shaper the outputs of which are connected to the inputs of frequency divider and of amplifiers. EFFECT: enhanced efficiency. 2 dwg