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International Ophthalmology

, Volume 16, Issue 4–5, pp 299–303 | Cite as

Self-tonometry: technical aspects of calibration and clinical application

  • S. Groenhoff
  • J. Draeger
  • C. Deutsch
  • R. Wiezorrek
  • B. Hock
Section 6: Intraocular Pressure

Abstract

Self-tonometry could be established as an important diagnostic tool in the early diagnosis and follow-up of glaucoma provided that a self-tonometer is precise, safe and easy to use. Furthermore, it has to comply with the legal standards for tonometer calibration. A new software-controlled detection system for the self tonometer permits the evaluation of external factors during the measurement which influence the precision of the tonometric readings. The updated version of the self-tonometer (ST) was compared to the Draeger hand-held applanation tonometer (HAT) in a clinical study with 82 patients (151 eyes). The results show a regression line characterized by a slope of 0.99, an y interception of 1.41, a correlation coefficient of 0.96 and a standard deviation for the ST readings of ±1.78 mmHg. Self-tonometry improves the IOP monitoring as well as patient compliance and therefore is a potential diagnostic tool in the management of glaucoma.

Key words

error detection system optical sensor self-tonometer self-tonometry 

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Copyright information

© Kluwer Academic Publishers 1992

Authors and Affiliations

  • S. Groenhoff
    • 1
  • J. Draeger
    • 1
  • C. Deutsch
    • 1
  • R. Wiezorrek
    • 1
  • B. Hock
    • 1
  1. 1.Department of OphthalmologyUniversity of HamburgHamburg 20Germany

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