Non-contact tonometer

A tonometer, non-contact technology, used in tonometers, eye testing equipment, medical science, etc., can solve problems such as the deterioration of the efficiency of checking intraocular pressure

Inactive Publication Date: 2006-11-15
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The efficiency of checking IOP is worsened by this confusion

Method used

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Examples

Experimental program
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Embodiment Construction

[0029] The present invention will be described in detail based on the illustrated embodiments.

[0030] figure 1 This is an external view of the non-contact tonometer viewed from the examiner's side, figure 2 It is the external view viewed from the side of the eye to be tested. On the surface of the main body 1 where the operator operates, a monitor 2 composed of a liquid crystal and a CRT for selecting the display of the measured value, the image of the eye to be tested, etc., and the setting of various devices is arranged, and is used to operate the display. Screen and trackball 3, roller 4, printer print switch 5, and measurement start switch 6 for adjusting the approximate position of the measurement unit to the eye to be measured.

[0031] The measurement unit 7 is placed on the main body 1 so as to be movable in the up, down, left, right, front and rear directions relative to the main body 1, and the intraocular pressure value can be measured by adjusting the position...

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PUM

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Abstract

A controller controls a memory to store the images of the anterior ocular segment immediately before and after air is blown onto the cornea. A measurement unit (7) measures intra ocular pressure value based on the deformation amount of the cornea due to the air blow. A display displays the image of the anterior ocular segment, based on the measured result.

Description

technical field [0001] The present invention relates to a non-contact tonometer which calculates the intraocular pressure value by an optical detection device when air is blown to the eye to deform the cornea. Background technique [0002] The non-contact tonometer is represented by the air blowing tonometer of US Patent No. P3585849 developed by Bernard Grolman. It blows air from a nozzle 11 mm away from the cornea of ​​the eye to be tested, and after optically detecting the flattening of the cornea, the measurement value is determined based on the time until the flattening is measured, and the value is corrected with a Grolman-type tonometer, Calculate eye pressure. Using the Grolman principle, the correct intraocular pressure value can be obtained. [0003] Almost 30 years have passed since this non-contact tonometer was developed, and many improved tonometers have been proposed. In particular, the alignment between the measured eye and the air blowing nozzle is the ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B3/16A61B3/14
CPCA61B3/165A61B3/16
Inventor 内田浩治
Owner CANON KK
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