A simulated eye is capable of being changed between a normal state and a dilated state. The simulated eye includes a circuit board, a controller electrically connected to the circuit board, a simulated iris electrically connected to the circuit board, and a simulated pupil. When the simulated iris is irradiated with light, the size of the colored area of the simulated iris is changeable by operationally powering on and powered off the simulated iris via the controller, whereby the simulated eye is changed between the normal state and the dilated state.