PURPOSE: To provide a safety device capable of performing concentration power training and the recovery visual acuity simultaneously by concentrating the mind on one point or one matter and relaxing the eyes and feeling, by performing such motion to move the eyes in the forward/backward, righward/ leftward, or upward/downward direction.

CONSTITUTION: This machine is constituted in such a way that a driving part 1 is provided, and a screw 8 and a guide 9 are provided at a connection part, and a guide plate 6 sliding on the guide and a traveling object 7 are provided, and instruction plates 4, 5 which support them are provided, and a cover 3 to increase a concentration power is provided, then, an eye hole 10 is attached on the cover.