Controller and eye-examining device having the same

A controller comprising:

• an operation unit configured to be operated by a user so as to be positioned in a first driving area or a second driving area;
• a first magnetic coupling part coupled to the operation unit and configured to move within a first area together with the operation unit;
• and
• a second magnetic coupling part detachably coupled to the first magnetic coupling part by magnetic force and configured to move within a second area,
• wherein the first area is larger than the second area so that a movement range of the first magnetic coupling part is larger than a movement range of the second magnetic coupling part,
• wherein the first magnetic coupling part and the second magnetic coupling part, while being coupled to each other by the magnetic force, move within the second area according to driving of the operation unit when the operation unit is in the second driving area, and
• wherein the first magnetic coupling part moves to an area outside the second area when the operation unit is in the first driving area, the first magnetic coupling part and the second magnetic coupling part are separated from each other, and an attractive force resulting from the magnetic force is generated between the second magnetic coupling part and the first magnetic coupling part.