In order to provide a biological rhythm adjustment device, etc., in a modern society where the living environment and working environment are changing, the circadian rhythm can be adjusted to maintain and improve the user's physical and mental health.The glasses-type wearable device (10) has a light source that irradiates the user's eyes with violet light (VL) in the first wavelength range from 360nm to 400nm and irradiates blue light (BL) in the second wavelength range of 460nm±20nm ( 11, 12), the luminescence of the light source (11, 12) is to control the (BL) and (VL) illumination according to the user's setting, schedule, past action history, and real world sunlight.為了提供一種生物節律調整裝置等，在生活環境、工作環境改變之現代社會中，可調整晝夜節律而維持及增進使用者的心身健康。眼鏡型可穿戴設備(10)具有：對使用者的眼照射360nm以上400nm以下之第1波長範圍內的紫光(VL)及照射460nm±20nm之第2波長範圍內的藍光(BL)之光源(11, 12)，光源(11, 12)之發光是根據使用者的設定、日程、過去的行動履歴、現實世界之日照等來控制(BL)及(VL)的照射。
