A pair of awareness glasses includes a frame, a light source, a driving unit, light guide lenses, and diffraction grating patterns. The light source unit is disposed in the frame. The light source unit is configured to generate light in response to input power. The driving unit is configured to supply the input power. The light guide lenses are configured to guide the light to the eyes of a user. The diffraction grating patterns are formed on surfaces of the light guide lenses. The diffraction grating patterns are configured to diffract and reflect the light to the eyes of the user. The light output from each of the diffraction grating patterns has a peak wavelength between 444 nm and 484 nm.