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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
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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.

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.