As for this invention, in the affected part where light it should irradiate selective, at the same time, it is possible light to irradiate intensively, the light where is strong from the illuminant, the optical remedy device which can prevent the fact that directly it is irradiated to the eye is offered. The derived optical component which concretely, possesses with the opposition aspect which opposes to the contact area and the aforementioned contact area which make the affected part contact, becomes the derived optical path In the aforementioned derived optical component, the first illuminant which incidence it can point the light where main wave length exists closely in the wave length range of infrared light Being the optical remedy device which it has, the material which forms the aforementioned derived optical component equality or offers the optical remedy device which possesses high refractive index by comparison with the refractive index of the organism.本発明は、光照射すべき患部に選択的、かつ、集中的に光照射することができ、光源からの強い光が、直接目に照射されるのを防止することができる光治療装置を提供する。具体的には、患部を接触させる接触面と前記接触面に対向する対向面とを有し、導光路となる導光部材と;前記導光部材に、主たる波長が近赤外光の波長範囲に存する光を入射させる第一光源と;を備える光治療装置であって、前記導光部材を構成する材質は、生体の屈折率と比較して同一或いは高い屈折率を有する光治療装置を提供する。
