JP2010082281A5 - - Google Patents

Claims (3)

An imaging optical system for imaging the fundus, having a focus lens movably arranged in the optical axis direction, and an image sensor for fundus imaging;
An observation optical system for observing the fundus of the subject's eye, having an image sensor for fundus observation;
A corneal index projection optical system for projecting an index for detecting corneal astigmatism on the cornea of the subject's eye;
An index detection optical system having a two-dimensional light receiving element for detecting the index projected on the cornea;
A monitor,
A control unit that processes an output signal from the fundus imaging image sensor or the fundus observation image sensor and displays at least one of the fundus image or the fundus observation image on the monitor;
In a fundus camera having
The control unit determines the presence or absence of corneal astigmatism of the subject's eye based on the imaging position of the index on the light receiving element, and the determination result is displayed on the monitor together with the fundus photographing image or the fundus observation image. A fundus camera characterized by being displayed on the screen. The fundus camera of claim 1,
A drive mechanism for moving the focus lens in the optical axis direction;
A fundus index projection optical system for projecting on the fundus a split index that is separated in a predetermined direction on the fundus according to the focus state of the apparatus with respect to the fundus,
The control unit drives and controls the drive mechanism based on a separation state of the split index image imaged on the observation imaging device, and when the subject's eye is determined to be corneal astigmatism, A fundus camera, wherein the drive mechanism is driven and controlled so that the focus lens is moved to a position corresponding to an average value of refractive power. 3. The fundus camera according to claim 2, wherein the control unit detects a deviation of the corneal refractive power in a separation direction of the split index with respect to an average corneal refractive power, and matches the split index based on a direction and a magnitude of the deviation. A fundus camera characterized in that a movement direction and a movement amount of the focus lens with respect to a position are obtained, and the drive mechanism is driven and controlled based on the obtained movement direction and movement amount.