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Related Experiment Videos

Clinical evaluation of rebound tonometer.

Leon N Davies1, Hannah Bartlett, Edward A H Mallen

  • 1School of Life and Health Sciences, Aston University, Birmingham, UK.

Acta Ophthalmologica Scandinavica
|April 28, 2006
PubMed
Summary

The ICare rebound tonometer shows reliable intraocular pressure (IOP) measurements, with slight, insignificant differences compared to the Goldmann tonometer. Repeatability is comparable to other non-Goldmann devices.

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Area of Science:

  • Ophthalmology
  • Biomedical Engineering
  • Clinical Measurement

Background:

  • Intraocular pressure (IOP) is a critical metric in diagnosing and managing glaucoma.
  • Accurate and repeatable IOP measurement is essential for effective patient care.
  • Rebound tonometry offers a portable and potentially easier alternative to Goldmann applanation tonometry.

Purpose of the Study:

  • To assess the reliability and repeatability of IOP measurements using a novel rebound tonometer (ICare).
  • To compare the performance of the ICare rebound tonometer against the established Goldmann tonometer.

Main Methods:

  • IOP was measured in 42 healthy adult eyes (18-30 years) using both ICare and Goldmann tonometers.
  • Measurements were conducted across two separate sessions to evaluate intersessional repeatability.

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  • Data analysis focused on bias and limits of agreement between devices and sessions.

    • Main Results:

    • The ICare tonometer yielded slightly higher IOP readings than the Goldmann tonometer, though this difference was not statistically significant.
    • Limits of agreement for repeated ICare measurements were +/- 5.11 mmHg, compared to +/- 3.15 mmHg for the Goldmann method.
    • Intersessional repeatability for the ICare tonometer was found to be poorer than the Goldmann tonometer.

    Conclusions:

    • The ICare rebound tonometer provides a small, statistically insignificant positive bias against the Goldmann tonometer in healthy subjects.
    • While less repeatable than the Goldmann tonometer, the ICare's intersessional repeatability is comparable to other non-Goldmann tonometers.
    • The ICare rebound tonometer may be a viable option for IOP assessment, with considerations for its repeatability.