Ultrasonic tonometer
AssigneeNidek Co., Ltd.
InventorsTetsuyuki MIWA, Tsutomu UEMURA, Kazunari SHIMIZU
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Abstract
An ultrasonic tonometer for measuring the eye pressure of an examinee's eye by means of an ultrasonic wave includes an ultrasonic actuator having an ultrasonic element and configured to irradiate the examinee's eye with the ultrasonic wave, and current adjustment means configured to adjust a current applied to the ultrasonic element to control the sound pressure or acoustic radiation pressure of the ultrasonic wave. With this configuration, the ultrasonic tonometer solving at least one of typical problems can be provided. For example, the ultrasonic tonometer capable of properly irradiating the examinee's eye with the ultrasonic wave can be provided.
Claims21
An ultrasonic tonometer for measuring an eye pressure of an examinee's eye by means of an ultrasonic wave, comprising:
- an ultrasonic actuator having an ultrasonic element and configured to irradiate the examinee's eye with the ultrasonic wave;
- and
- current adjustment means configured to adjust a current applied to the ultrasonic element to control a sound pressure or acoustic radiation pressure of the ultrasonic wave.
An ultrasonic tonometer for measuring an eye pressure of an examinee's eye by means of an ultrasonic wave, comprising:
- irradiation means having an ultrasonic element and configured to irradiate the examinee's eye with the ultrasonic wave;
- and
- control means configured to control the irradiation means,
- wherein the control means corrects an application frequency for the ultrasonic element.
13-15. (canceled)
17-19. (canceled)
An ultrasonic tonometer for measuring an eye pressure of an examinee's eye by means of an ultrasonic wave, comprising:
- irradiation means having an ultrasonic element and configured to irradiate the examinee's eye with the ultrasonic wave;
- and
- control means configured to control the irradiation means,
- wherein the control means controls a sound pressure or acoustic radiation pressure of the ultrasonic wave output by the irradiation means to change eye pressure measurement accuracy.
Dependencies are inferred from the claim text.