An object of the present invention is to emit light crossing the anterior chamber of the eyeball and receive light emitted from the eyeball across the anterior chamber as compared to emitting and receiving light with the eyeball facing front. An eyeball optical measuring device and the like in which the light emitting means or the light receiving means is easily arranged on the eye side are provided. An optical measuring device includes an optical system used for measuring characteristics of aqueous humor in an anterior chamber of a subject's eyeball, a holding unit that holds the optical system, and the like. 20 includes a light emitting system 20A and a light receiving system 20B. The optical path 28 is set so that when the eyeball 10 is abducted, the light emitted from the light emitting system 20A passes through the anterior chamber 13 and can be received by the light receiving system 20B. [Selection] Figure 1【課題】眼球の前眼房を横切る光を出射し、前眼房を横切って眼球から出た光を受光する場合において、眼球が正面を向いた状態で光の出射及び受光をする場合に比べ、目頭側における光出射手段又は受光手段の配置が容易な眼球の光計測装置等を提供する。【解決手段】光計測装置１は、被計測者の眼球１０の前眼房１３における眼房水の特性の計測に用いる光学系２０、光学系２０などを保持する保持部５０を備え、光学系２０は、発光系２０Ａと受光系２０Ｂとを備えている。光路２８は、眼球１０が外転したとき、発光系２０Ａから出射した光が前眼房１３を横切るように通過し、受光系２０Ｂで受光できるように設定されている。【選択図】図１
