PROBLEM TO BE SOLVED: To provide eye width display structure of a surgical microscope which can easily reproduce a personal eye width even if eyes are not actually attached to eyepieces.SOLUTION: Rotation of ocular lens barrel 15, 16 is speed-increased by a gear ratio of a large gear 22 and a small gear 27, and is transmitted to a dial 25, the dial 25 is rotated more greatly than the rotation angle of the real ocular lens barrel 15, 16, and therefore the relationship between the scale of the dial 25 and a marker 28 can easily be read. The influence due to the error between the marker 28 and the scale is reduced and the eye width is reproduced easily and precisely. Accordingly, the personal eye width can be easily reproduced even if an observer does not actually attach his or her eyes to an eyepiece 17.SELECTED DRAWING: Figure 6COPYRIGHT: (C)2019,JPO&INPIT【課題】実際に眼をアイピースに付けなくても個人の目幅を容易に再現することができる手術顕微鏡の目幅表示構造を提供する。【解決手段】接眼鏡筒部15、16の回転が大ギア22と小ギア27のギア比により増速されてダイヤル25に伝達され、ダイヤル25が実際の接眼鏡筒部15、16の回動角度よりも大きく回転するため、ダイヤル25の目盛とマーカー28との関係が読み取りやすい。マーカー28と目盛との誤差による影響が小さくなり、目幅を正確に再現しやすくなる。そのため観察者は眼を実際にアイピース17に付けなくても個人の目幅を容易に再現することができる。【選択図】図6
