公开(公告)号：US20220031160A1

公开(公告)日：2022-02-03

申请号：US17280057

申请日：2018-11-23

Applicant: NIDEK CO., LTD.

Inventor： Tetsuyuki MIWA ,  Tsutomu UEMURA ,  Andrea CARDONI ,  Ignacio MARTINEZ GONZALEZ

IPC: A61B3/16

Abstract: An ultrasonic tonometer, which measures an intraocular pressure of a subject eye using an ultrasonic wave, has an ultrasonic actuator including an ultrasonic element that generates an ultrasonic wave and a sonotrode that propagates the ultrasonic wave generated from the ultrasonic element, and irradiating the subject eye with the ultrasonic wave. The sonotrode includes an uneven portion in which a thickness of the sonotrode varies in a sound axis direction of the ultrasonic wave.