EYE REFRACTIVE POWER MEASURING APPARATUS

PROBLEM TO BE SOLVED: To easily recognize whether an additional degree is necessary or not for a subject's eye when the visual acuity is measured for myopia, and to measure the visual acuity for myopia with the addition of the additional degree in a short period of time. SOLUTION: The eye refractive power measuring apparatus includes a refractive power measuring means for measuring the refractive power of the subject's eye by projecting a measuring target on the ocular fundus and receiving the light flux reflected from the ocular fundus by a light receiving element; and a visual target presenting optical system for changing the visual target to be presented to the subject's eye from the hyperopic distance to the myopic distance. The eye refractive power measuring apparatus also includes: an input means for inputting a transfer signal to the measurement of the visual acuity for myopia; a control means for switching the visual target of the visual target presenting optical system to the myopic distance in the measurement of the visual acuity for myopia; a conducting means for measuring the refractive power by the refractive power measuring means when the visual acuity is measured for myopia; and a determining means for finding the refractive power necessary for the subject's eye to see the visual target in the myopic distance, comparing the found refractive power with the refractive power for myopia obtained by the measuring means, determining whether the additional degree is necessary for the subject's eye in the measurement of the visual acuity for myopia, and announcing the result of the determination. COPYRIGHT: (C)2010,JPO&INPIT