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Related Experiment Videos

[Intraocular pressure measurement using the Proview tonometer].

J Moreno Montañés1, L M Sádaba, H Heras

  • 1Departamento de Oftalmología, Clínica Universitaria de Navarra, Pamplona, España. jmoreno@unav.es

Archivos De La Sociedad Espanola De Oftalmologia
|March 8, 2005
PubMed
Summary

The Proview tonometer demonstrated low accuracy and reproducibility compared to the Goldmann tonometer. It is not clinically useful except for specific cases with severe corneal diseases.

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Area of Science:

  • Ophthalmology
  • Medical Devices
  • Diagnostic Technology

Background:

  • Intraocular pressure (IOP) measurement is crucial for diagnosing and managing glaucoma.
  • Existing tonometers like the Goldmann tonometer (GT) are standard but can be challenging in certain patients.
  • Novel tonometry methods are being developed to improve accuracy and accessibility.

Purpose of the Study:

  • To evaluate the accuracy and reproducibility of a new ocular tonometer, the Proview, against the Goldmann tonometer (GT).
  • To assess the Proview tonometer's performance in measuring intraocular pressure (IOP) by visualizing a phosphene.

Main Methods:

  • A comparative study involving 110 patients and 110 eyes.
  • Single Goldmann tonometer (GT) measurement followed by three Proview measurements by the same investigator.

Related Experiment Videos

  • Recording of failed attempts to visualize the phosphene with the Proview tonometer.

    • Main Results:

    • The Proview tonometer showed a significantly higher mean IOP measurement (5 mm Hg higher) than the GT (p < 0.001).
    • Low correlation (R = 0.67) and coefficient of determination (R² = 0.45) were observed between Proview and GT in the right eye.
    • A notable percentage of failed attempts to visualize the phosphene were recorded for the Proview tonometer.

    Conclusions:

    • The Proview tonometer exhibits low accuracy and reproducibility when compared to the Goldmann tonometer.
    • A significant learning curve is associated with Proview tonometer use, requiring practice for phosphene visualization.
    • The Proview tonometer is not recommended for general clinical use, except in cases where the GT is difficult to employ due to severe corneal conditions.