An optical apparatus is disclosed. The optical apparatus includes an optical emitting module, a sensing module, and a processing module. The optical emitting module is used to emit a laser toward a specific region of skin surface. The sensing module is used to sense tissue distribution information under the specific region of skin surface. The processing module is used to adjust at least one laser parameter that the optical emitting module emits the laser toward the specific region of skin surface according to the tissue distribution information.
