Measurement and Analysis of Human Eye Excited by an Air Pulse

For the diagnosis and treatment of glaucoma, a reliable and non-invasive measurement method of the internal eye pressure, i.e. the intraocular pressure (IOP), is desired. The IOP resists a deformation of the eye and thus non-contact tonometers, which deform the eye by a short air pulse, are suitable...

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Bibliographic Details
Main Authors: Kaneko, M., Kempf, R., Kurita, Y., IIda, Y., Mishima, H.K., Tsukamoto, H., Sugimoto, E.
Format: Conference Proceeding
Language:eng ; jpn
Subjects:
Calibration
Cameras
Glaucoma
High speed camera
Human Eye
Humans
Infrared surveillance
Monitoring
Non-contact Tonometer
Optical reflection
Pressure measurement
Pulse measurements
Resists
Time measurement
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Summary:For the diagnosis and treatment of glaucoma, a reliable and non-invasive measurement method of the internal eye pressure, i.e. the intraocular pressure (IOP), is desired. The IOP resists a deformation of the eye and thus non-contact tonometers, which deform the eye by a short air pulse, are suitable to estimate the IOP. By monitoring the reflection of an incident infrared light, the tonometer measures the time an applied air jet flattens part of the eye. The relationship between flattening time and IOP are provided by calibration. In our work, we used an additional high speed camera to capture the eye deformation directly and obtain more data during the pressure measurement. We show that the principle shape of the deformation can be understood by assuming simple non-linear material properties of the cornea in an eye model. Furthermore, we discuss which sources of error are still needed to be overcome to give a medical meaningful diagnosis for the examined eye by the data from the high speed camera
DOI:10.1109/MFI.2006.265632