| 摘要 |
An eye refractive power measurement apparatus capable of reducing an influence of scattered light and performing measurement with high accuracy. The apparatus has a measurement optical system including a system having a light source projecting spot-shaped measurement light onto a fundus of an examinee's eye, and a system having an optical axis, a photodetector, a ring-shaped aperture, a member by which the light reflected from the fundus via a peripheral pupillary portion and the aperture forms a ring-shaped image on the photodetector, and a diaphragm of a size such that a projection region by the diaphragm on the photodetector overlaps the axis within a predetermined amount and that the reflection light forms the image within the region in projecting the measurement light onto a myopic eye with the measurable highest diopter, and a part which obtains the eye refractive power based on an output from the photodetector.
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