| 摘要 |
An optometric apparatus for examining refractive power of an examinee's eye subjectively, capable of performing highly-precise examination. The apparatus has a test window (4) through which a presented optotype is seen, first spherical-power applying means (11,12,13) for applying spherical power to the eye by changing a combination of spherical lenses (110,120,130) in the window (4), cylindrical-power applying means (141a,141b) for applying cylindrical power to the eye by changing a relative angle of a cylindrical axis of cylindrical lenses in the window, second spherical-power applying means (15) including a spherical lens (150,150') for correction, instruction means (8) for instructing examination spherical and cylindrical power, power-determining means (8) for determining power applied by the power-applying means so that a difference between the instructed examination power, and resultant spherical and cylindrical power through conversion for a spectacles wearing reference position falls within a predetermined permissible difference, and control means (100) for controlling driving of the power-applying means (18a-18e). |
