Light path assembly and eye protection instrument with same

The utility model provides a light path assembly used for an eye protection instrument, the eye protection instrument comprises a main body and a mounting seat connected with the main body, the light path assembly is mounted on the mounting seat, the light path assembly comprises a cavity, a light source, a convex lens and an optical filter, the light source is mounted at a first end of the cavity, the convex lens and the optical filter are mounted at a second end of the cavity, and the optical filter is mounted on the cavity. The light source and the convex lens are coaxially arranged; the utility model further provides the eye protection instrument using the optical path assembly. According to the utility model, the LED light source instead of a laser light source is adopted, the convex lens is used for converging light rays and only allowing red light for protecting eyes to penetrate through to form light spots which are enough for treating and preventing myopia, and the same function can be realized witho