Patent ID: 7275828

Claim:
An eye refractive power measurement apparatus for measuring eye refractive power of an eye of an examinee, the apparatus comprising: a measurement optical system including a measurement optical axis, a hole mirror having an aperture through which the optical axis passes and a reflective surface around the aperture, a concave mirror arranged on the optical axis, a projection optical system having a measurement target arranged on the optical axis, which projects measurement light from the measurement target onto a fundus of the examinee's eye via the aperture of the hole mirror and the concave mirror, and a photo-receiving optical system having an image-forming member and a photodetector arranged on the optical axis, which photo-receives the measurement light reflected from the fundus via the concave mirror, the reflective surface of the hole mirror and the image-forming member by using the photodetector; a movement unit which moves the measurement target and at least one of the image-forming member and the photodetector in a direction of the optical axis to have a positional relationship optically conjugate with the fundus; and a calculation part which obtains eye refractive power based on: any one of a travel position and a travel amount of at least one of the image-forming member and the photodetector; and an output from the photodetector.