Provided is a technique for easily inspecting a human eye having an internal strabismus. A periscope device includes a cylindrical body, a first mirror provided inside a first end of the cylindrical body, and a second mirror provided inside a second end. 7 is provided. In one embodiment, when the first and second mirrors 5 and 7 look into the periscope device 3 with the eye 2 of the inner perspective during the examination of the other eye 1 that is not the inner perspective, each of the mirrors 5 and 7 changes its line of sight. It arrange positions so that it may deflect at a substantially right angle. The periscope-type device 3 further includes a base-out prism 9 disposed in front of the first mirror 5, and the line of sight of the internal perspective eye 2 is deflected toward the first mirror 5 during use of the periscope-type device 3. In another embodiment, the first and second mirrors 5, 7 are not parallel to each other, and the first mirror 5 is internal when looking into the periscopic device 3 with the inspecting eye 2 during the examination of the other eye 1. It is arranged so that the line of sight of the perspective eye 2 is reflected by the first mirror 5 and directed toward the second mirror 7. [Selection] Figure 1【課題】内斜視を有する人の眼を検査し易くする技術の提供。【解決手段】潜望鏡式装置３は、筒状体４、筒状体４の第一端部６の内側に設けられた第１ミラー５及び第２端部８の内側に設けられた第２ミラー７を備える。一実施形態では、第１及び第２ミラー５，７は、内斜視でない他方の眼１の検査中に内斜視の眼２で潜望鏡式装置３を覗くと、各ミラー５，７がその視線を略直角に偏向させるように配置されている。潜望鏡式装置３は第１ミラー５の前方に配置されたベースアウトプリズム９をさらに備え、潜望鏡式装置３の使用中に内斜視の眼２による視線が第１ミラー５に向かって偏向する。別の実施形態では、第１及び第２ミラー５，７は相互に平行せず、第１ミラー５は、他方の眼１の検査中に内斜視の眼２で潜望鏡式装置３を覗くと内斜視の眼２による視線が第１ミラー５に反射して第２ミラー７に向かうように配置されている。【選択図】図１
