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Related Experiment Videos

Rebound tonometer compared with goldmann tonometer in normal and pathologic corneas.

Javier Moreno-Montañés1, Noelia García, Ana Fernández-Hortelano

  • 1Department of Ophthalmology, Clínica Universitaria, Universidad de Navarra, Pamplona, Spain. jmoreno@unav.es

Cornea
|April 26, 2007
PubMed
Summary
This summary is machine-generated.

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The rebound tonometer (RT) and Goldmann handheld tonometer (GT) show similar intraocular pressure (IOP) measurements in normal and altered corneas. The RT is particularly useful for measuring IOP in corneas with pathologies, offering ease of use and reduced infection risk.

Area of Science:

  • Ophthalmology
  • Medical Devices
  • Tonometry

Background:

  • Intraocular pressure (IOP) measurement is crucial for diagnosing and managing glaucoma.
  • Traditional tonometers like the Goldmann handheld tonometer (GT) can be challenging to use with altered corneas.
  • The rebound tonometer (RT) offers a potentially simpler alternative for IOP assessment.

Purpose of the Study:

  • To compare intraocular pressure (IOP) measurements between the rebound tonometer (RT) and the Goldmann handheld tonometer (GT).
  • To evaluate the performance of both tonometers in normal and pathologically altered corneas.

Main Methods:

  • A prospective study involving 208 normal and 50 pathologically altered corneas.
  • Randomized IOP measurements obtained by a single observer using both RT and GT.

Related Experiment Videos

  • Comparison of medians, interquartile ranges, and Bland-Altman analysis for agreement.

    • Main Results:

    • Excellent correlation (r2 = 0.86) was found between RT and GT measurements (P < 0.001).
    • Good agreement was observed, with median differences ≤2 mm Hg in 77.4% of normal and 73% of altered corneas.
    • The GT failed to obtain measurements in 10% of cases, while the RT failed in only 2%.

    Conclusions:

    • Both rebound tonometry (RT) and Goldmann tonometry (GT) provide comparable IOP measurements.
    • RT is advantageous in altered corneas where GT measurements may be difficult due to distorted readings.
    • The RT's disposable tip and lack of anesthetic requirement enhance its utility in clinical settings, minimizing infection risk.