Patent ID: 9241623
Filing Date: 2016-01-26
CPC Classification: A61B

Claim Text:
1. An ocular axial length measurement apparatus comprising: a measurement unit including a measuring optical system with an optical interferometer for optically measuring the ocular axial length of an examinee's eye in a contactless manner, and an imaging optical system for capturing an anterior segment observation image; a drive mechanism for adjusting the relative positions of the measurement unit and the examinee's eye; an operation section operated by an examiner so as to drive the drive mechanism or the measurement unit; a monitor capable of displaying the anterior segment observation image; and a controller that controls the measurement unit and the driving of the drive mechanism based on an operation signal output from the operation section, an ultrasonic probe for obtaining length information in an axial direction of the examinee's eye mounted or attached via a cable to the apparatus; and a mode switch that switches a measurement mode of the apparatus between a measurement with the optical interferometer and a measurement with the ultrasonic probe, wherein the controller displays on the monitor a reception waveform of an echo signal detected by the ultrasonic probe and a gate target indicating a gate position corresponding to a predetermined site with respect to the reception waveform; when the measurement with the optical interferometer is selected by the mode switch, the controller moves the measurement unit based on an operation signal from the operation section; and when the measurement with the ultrasonic probe is selected by the mode switch, the controller adjusts the gate position with respect to the reception waveform based on an operation signal from the operation section.