light to be radiated to a preset position of the treatment area according to a preset pattern meanwhile the signal detection unit 50 may detect a signal transferred from the treatment area when the light is radiated to the treatment area by the beam delivery unit 40 the tissue of the treatment area is varied by the transferred energy and accordingly various forms of signals may be presented the signal detection unit 50 may identify whether the treatment area experiences a tissue variation by detecting the signals in the instant embodiment it may be configured so that the occurrence of micro cavitation in the rpe cell r may be detected through sound wave information reflected or phase information on the reflected light when light is radiated although the drugen treatment device 1 according to the present invention has been schematically described this is merely an exemplary configuration for describing the present invention and various changes may be made thereto in connection with fig8 a drugen treatment method and method for controlling the treatment device using the drugen treatment device 1 of fig7 are described first the step of detecting the position of drugen to treat the drugen d is performed s 10 this step is performed by the test.