PROBLEM TO BE SOLVED: To provide a new technology to optimize a diameter of an objective lens without deteriorating a measurement range and measurement accuracy by a plurality of optical systems corresponding to types of objective measurement.SOLUTION: An ophthalmologic apparatus includes an objective lens, a refractive power measurement optical system, an inspection optical system, and a cornea shape measurement optical system. The refractive power measurement optical system projects a light onto an eye to be examined through the objective lens, and detects its return light. The inspection optical system projects a light from a light source deflected by an optical scanner onto the eye to be examined through the objective lens, and detects its return light. The cornea shape measurement optical system projects an arc-shaped or circumferential measurement pattern onto the eye to be examined from an outer edge side of the objective leans, and detects a return light from the cornea. When a working distance is represented as WD, a distance from the corneal vertex of the eye to be examined to the pupil is represented as d1, a distance from the pupil of the eye to be examined to the ocular fundus is represented as d2, and a scan range by the optical scanner is represented as SA square, the diameter of the objective lens is ((WD+d1)×SA/d2) or more.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】他覚測定の種別に対応した複数の光学系による測定範囲や測定精度を劣化させることなく対物レンズの径を最適化するための新たな技術を提供する。【解決手段】眼科装置は、対物レンズと、屈折力測定光学系と、検査光学系と、角膜形状測定光学系と、を含む。屈折力測定光学系は、対物レンズを介して被検眼に光を投射し、その戻り光を検出する。検査光学系は、光スキャナーにより偏向された光源からの光を対物レンズを介して被検眼に投射し、その戻り光を検出する。角膜形状測定光学系は、対物レンズの外縁側から円弧状又は円周状の測定パターンを被検眼に投射し、角膜からの戻り光を検出する。作動距離をＷＤ、被検眼の角膜頂点から瞳孔までの距離をｄ１、被検眼の瞳孔から眼底までの距離をｄ２、光スキャナーによるスキャン範囲をＳＡ四方であるとしたとき、対物レンズの直径は、（（ＷＤ＋ｄ１）×ＳＡ／ｄ２）以上である。【選択図】図１
