Being the device for remedying the system of the human with light or system of the animal, when using when the surface which at the time of the detector and the use which detect the degree of approach of the surface and the system which in the application section and when using it possesses the surface which confronts in the illuminant and the system which irradiate light vis-a-vis system confront in particular system confronts in aforementioned system leaves from system only, irradiating light, in order that incidence it can point to system, the device which possesses the control means which respond to the particular detector in order to control the illuminant.光による人間の組織又は動物の組織の治療のための装置であって、使用時に組織に対して光を照射する光源と、組織に面した表面を有する適用部と、使用時に当該組織に面した表面と組織との近接度を検出する検出器と、使用時に前記組織に面した表面が組織から離れたときにのみ、光を照射して組織に入射させるべく光源を制御するために当該検出器に応答する制御手段を有する装置。