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Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter
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[Contact glass tonometer]

H Kanngiesser1, Y Robert, P Dekker

  • 1Arbeitsgemeinschaft für industrielle Forschung AFIF, Zürich.

Der Ophthalmologe : Zeitschrift Der Deutschen Ophthalmologischen Gesellschaft
|October 1, 1996
PubMed
Summary
This summary is machine-generated.

This novel contact lens tonometer enables continuous intraocular pressure and pulse curve monitoring, aiding early glaucoma diagnosis. It allows adjustable pressure for detailed fundus examination, showing promise for clinical applications.

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Area of Science:

  • Ophthalmology
  • Biomedical Engineering
  • Medical Devices

Background:

  • Accurate intraocular pressure (IOP) measurement is crucial for glaucoma diagnosis and management.
  • Current tonometry methods have limitations in continuous monitoring and simultaneous fundus visualization.
  • A need exists for advanced diagnostic tools offering real-time physiological data.

Purpose of the Study:

  • To present a novel contact lens-integrated tonometer for simultaneous IOP measurement and ophthalmoscopy.
  • To evaluate the device's capability for continuous pulse curve recording and adjustable IOP induction.
  • To assess the potential of this device for early glaucoma detection and circulatory problem indication.

Main Methods:

  • Development of a contact lens incorporating a tonometer with three force sensors.
  • Continuous measurement of IOP and eye surface force exerted by the lens.
  • Induction and adjustment of different eye pressures to study fundus changes.
  • Comparison of device measurements with a Statham transducer in enucleated human eyes.

Main Results:

  • The contact lens tonometer allows simultaneous IOP measurement and ophthalmoscopy.
  • Continuous pulse curve recording provides indicators of circulatory issues.
  • Adjustable force sensors enable controlled alteration of intraocular pressure.
  • Good correlation was found between the device and a Statham transducer in preliminary tests.

Conclusions:

  • The integrated contact lens tonometer shows potential for continuous IOP and pulse monitoring.
  • The device may offer valuable data for early glaucoma diagnosis and circulatory assessment.
  • Further clinical studies are needed to fully examine the clinical relevance of the measurements.