Patent attributes
In order to accurately align an eye examining portion with the center of the pupil, (a) the interval d between illumination light source images PL and PR is an interval obtained when the operation distance has been properly position-aligned by other alignment means. (b) shows an interval d1 in a state in which the operation distance is longer than to a proper position, and (c) shows an interval d2 in a state in which the operation distance is shorter than the proper position. Even if the operation distance fluctuates when position alignment is effected with the center of the pupil, whereby the interval becomes d1 and d2 as shown in (b) and (c), a measuring portion is moved in front to rear direction and is made coincident with the reference interval d, as shown in (a), whereby a proper operation distance is obtained.
