Patent ID: 7438416
Filing Date: 2008-10-21
Classification: A61B

Abstract:
1. An optometric apparatus for examining refractive power of an eye of an examinee subjectively, the optometric apparatus comprising: a test window through which the examinee looks at a presented optotype; a spherical-power applying unit, including at least three disks for spherical lenses in which a plurality of spherical lenses with different power are respectively arranged, which applies spherical power to the eye by rotating the disks respectively by a motor to change a combination of the spherical lenses to be arranged in the test window; a first cylindrical-power applying unit, including a second cylindrical-power applying unit, including a disk in which a cylindrical lens for correction with weaker power than step-change power of the cylindrical power applied by the first cylindrical-power applying unit is arranged, which applies cylindrical power to the eye by rotating the disk by a motor and arranging the cylindrical lens for correction in the test window; a control unit which outputs an instruction signal for instructing examination spherical power and examination cylindrical power; a memory which stores: a control unit which calls up combination information from the memory based on the instruction signal from the control unit, and controls driving of the motors of the respective power-applying units based on the called-up combination information.