PROBLEM TO BE SOLVED: To provide an eye refractivity measurement device capable of measuring eye refractivity accurately regardless of a diopter of a subject eye.SOLUTION: The eye refractivity measurement device includes: a light projecting optical system 3 projecting a measurement light flux in a spot shape to an eyeground from a position separated from a pupil center of a subject eye E by a predetermined distance a light receiving optical system 5 extracting reflection light from the eyeground by a light block part 52 arranged at a conjugate position with a pupil of the subject eye E and including an opening in a shape of a ring or plural spots and making the reflection light incident on a two-dimensional imaging element 54 calculation means acquiring eye refractivity of the subject eye E based on output of the two-dimensional imaging element 54 and a deflection member 48 for deflecting the measurement light flux to a position separated from the pupil center of the subject eye E by a predetermined distance. The deflection member 48 is arranged at a conjugate position with the pupil of the subject eye E in a shared light path of the light projecting optical system 3 and the light receiving optical system 5. Rotation means is arranged, the rotation means rotating the deflection member 48 with an optical axis of the light projecting optical system 3 and light receiving optical system 5 as a center.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】被検眼の屈折度数によらず、精度よく眼屈折力を測定することができる眼屈折力測定装置を提供する。【解決手段】被検眼Eの瞳孔中心から所定距離離れた位置から眼底にスポット状の測定光束を投光する投光光学系3と、被検眼Eの瞳孔と共役位置に配置されたリング状又は複数の点状の開口を持つ遮光部52により眼底からの反射光を取り出し二次元撮像素子54に受光させる受光光学系5と、二次元撮像素子54の出力に基づいて被検眼Eの眼屈折力を得る演算手段と、を有しており、被検眼Eの瞳孔中心から所定距離離れた位置に測定光束を偏向させるための偏向部材48を有し、偏向部材48は、投光光学系3と受光光学系5の共用光路の被検眼Eの瞳孔と共役位置に配置され、偏向部材48を投光光学系3及び受光光学系5の光軸中心に回転させる回転手段を有する。【選択図】図1
