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Ultrasonic tonometer

An ultrasonic and tonometer technology, applied in the directions of sonic diagnosis, infrasound diagnosis, ultrasonic/sonic/infrasound equipment control, etc., can solve problems such as corneal flattening, ultrasonic irradiation of the inspected eye, and ultrasonic irradiation of difficult corneas.

Pending Publication Date: 2021-06-04
NIDEK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the device disclosed in Japanese Patent Laid-Open No. 5-253190, the ultrasonic wave is blocked by the ultrasonic sensor
Therefore, it is difficult to sufficiently irradiate the subject's eye with ultrasonic waves
Therefore, it is difficult to properly irradiate the cornea with ultrasound
In practice, it is difficult to apply ultrasonic waves to the eye to flatten or dent the cornea

Method used

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Examples

Experimental program
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Effect test

no. 1 Embodiment approach ＞

[0021] Hereinafter, the first embodiment according to the present disclosure will be described. The ultrasonic tonometer of the first embodiment measures the intraocular pressure of the subject's eye in a non-invasive manner. The ultrasonic tonometer measures the intraocular pressure of the eye to be examined based on, for example, a change in the shape of the cornea when the eye is irradiated with ultrasound or a reflected wave of the ultrasound from the eye to be examined.

[0022] The ultrasonic tonometer includes, for example, an ultrasonic generating unit (for example, the ultrasonic unit 100 ), a detecting unit (for example, the detecting unit 300 ), and a control unit (for example, the control unit 70 ). The ultrasonic generating unit has, for example, a vibrator, and generates ultrasonic waves toward the subject's eye. The detection unit detects, for example, the output of the ultrasonic wave generation unit. The detection unit detects, for example, ultrasonic waves,...

no. 2 Embodiment approach ＞

[0036] Hereinafter, a second embodiment according to the present disclosure will be described. The ultrasonic tonometer according to the second embodiment includes, for example, an ultrasonic generation unit, a deformation detection unit (deformation detection system 260 ), and a control unit. The ultrasonic generation unit generates ultrasonic waves toward the subject's eye. The deformation detection unit detects the deformation state of the cornea. The deformation detection unit optically detects the deformation state of the cornea, for example. For example, the deformation detection unit may be set so that the intensity of the detection signal becomes maximum when the cornea is deformed into a predetermined shape. In addition, the deformation detection unit can detect the deformation state of the cornea from the captured image. The deformation detection unit outputs a detection signal corresponding to the detection result. The control unit controls the ultrasonic genera...

no. 3 Embodiment approach ＞

[0045] Hereinafter, a third embodiment according to the present disclosure will be described. An ultrasound tonometer according to a third embodiment includes an ultrasound generating unit and a control unit. The ultrasonic generation unit generates ultrasonic waves toward the subject's eye. The control unit controls the ultrasonic generation unit. When the ultrasonic generation unit irradiates the eye with ultrasonic waves and a predetermined irradiation time elapses, the control unit stops the irradiation of ultrasonic waves. Accordingly, the ultrasonic tonometer can reduce discomfort to the subject.

[0046] In addition, the ultrasonic tonometer may further include a deformation detection unit that detects the deformation state of the cornea of ​​the subject's eye. The deformation detection unit outputs a detection signal corresponding to the detection result. The control unit may determine whether the cornea is deformed into a predetermined shape capable of measuring i...

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Abstract

The invention provides an ultrasonic tonometer, which can monitor the ultrasonic output while suppressing the influence on the irradiation of ultrasonic waves. An ultrasonic tonometer for measuring the intraocular pressure of an eye to be examined is provided with: an ultrasonic wave generation unit that has an oscillator and generates ultrasonic waves toward the eye to be examined; a detection unit that detects the output of the ultrasonic wave generation unit; and a control unit that monitors a detection signal of the detection unit, the detection unit being disposed outside an irradiation path of the ultrasonic waves irradiated from the ultrasonic wave generation unit toward the eye to be examined.

Description

technical field [0001] An aspect of the present disclosure relates to an ultrasonic tonometer for measuring intraocular pressure of an eye to be examined using ultrasonic waves. Background technique [0002] As a non-contact tonometer, an air jet tonometer is also generally used. The air jet tonometer converts the air pressure into an intraocular pressure when the cornea is in a predetermined deformed state by detecting the applanation state of the cornea when air is jetted to the cornea and the air pressure jetted to the cornea. [0003] In addition, as a non-contact tonometer, an ultrasonic tonometer for measuring intraocular pressure using ultrasonic waves has been proposed (see Japanese Patent Application Laid-Open No. 5-253190). The ultrasonic tonometer of Japanese Patent Application Laid-Open No. 5-253190 detects the applanation state of the cornea when ultrasonic waves are radiated to the cornea and the radiation pressure injected to the cornea, and converts the radi...

Claims

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Application Information

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IPC IPC(8): A61B8/10A61B8/08A61B8/00
CPCA61B8/10A61B8/08A61B8/54A61B8/58
Inventor 三轮哲之植村努
Owner NIDEK CO LTD
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