An image display apparatus has light beam emitting units (304L, 304R)
which emit light beams based on image information and a set operating
frequency, and MEMS mirrors (305L, 305R) which deflect the emitted light
beams by deflection operations based on the operating frequency, in
correspondence with the right and left eyes. Resonance frequency
detection units (306L, 306R) respectively detect the resonance
frequencies of the MEMS mirrors (305L, 305R). A control unit (307) sets
the operating frequency of the MEMS mirrors (305L, 305R) based on the
detected resonance frequencies.